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Sample search results for: a-site ordered perovskite

Page:   2  3  4  5 
 
1 Effect of Explicit Cationic Size and Valence Constraints on the Phase Stability of 1:2 B-Site-Ordered Perovskite
 

Summary:  + , and Y3+ , whereas pseudocubic perovskites result for M ) Cu2+ and Zn2+. For A-site substitutions... in the perovskite structure of Sr3CaRu2O9. This suggests that the maximum average A-site radius for the perovskite... and valence that control the crystallization of Sr3CaRu2O9 into a ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
2 Vol. 34 (2003) ACTA PHYSICA POLONICA B No 2 CONTROL OF MOTT TRANSITION
 

Summary:  of the compositional change of the perovskite A-site (non-TMO site). Fig. 1. Metal#21;insulator phase diagram based... . The distortion of the bond angle M-O-M depends on the ionic radius of the A-site ion, namely a larger distortion... state should play an important role not only in real- izing the A-site ...

  

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

 

Collection: Physics

 
3 Physics of the Earth and Planetary Interiors 155 (2006) 96103 Al, Fe substitution in the MgSiO3 perovskite structure
 

Summary:  -site fixed at zero. Consequently, all the Fe atoms occupy the A-site of the perovskite structure... refer to the dodecahedral A-site and octahedral B-site, respectively. McCammon (1998) reported... , previous studies indicate that Fe2+ occu- pies the dodecahedral A-site, whereas the location of Fe3+ within

  

Source: Jacobsen, Steven D. - Department of Earth and Planetary Sciences, Northwestern University

 

Collection: Geosciences

 
4 Perovskites by Design: A Toolbox of Solid-State Raymond E. Schaak and Thomas E. Mallouk*
 

Summary:  charged, it remains in the original perovskite block, so La2/3TiO3 has ordered A-site cations and defects... the defect structure and ordering of A-site cations in product perovskite phases. A variety of three... that have divalent A-site cations ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
5 Topochemical Synthesis of Three-Dimensional Perovskites from Lamellar Precursors
 

Summary:  A-site disordering occurs in the other perovskites. In all cases, the anisotropic texture... reaction allows them to move in the perovskite lattice. Similar disordering of A-site cations occurs... -type perovskites that are cation-disordered (or that contain only Eu and no other ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
6 E-mail address: achakhmo@gale.lakeheadu.ca The Canadian Mineralogist
 

Summary:  Africa) contain perovskite with unremarkable Nb, LREE and Th contents (Table 1, anal. 7­8). In order... -994 (2000) OCCURRENCE, ALTERATION PATTERNS AND COMPOSITIONAL VARIATION OF PEROVSKITE IN KIMBERLITES ANTON R... , Ontario P7B 5E1, Canada ABSTRACT The present work summarizes a detailed investigation of ...

  

Source: Chakhmouradian, Anton - Department of Geological Sciences, University of Manitoba

 

Collection: Geosciences

 
7 Electronic spin state of iron in lower mantle perovskite
 

Summary:  as- signed to Fe2 at the 8- to 12-coordinated pseudododecahedral site (A site). These are widely... sites). For example, when Fe2 , Fe3 (A site), and Fe3 (B site) are in the high-spin state (2H3H3h... 2 is in the high-spin state, Fe3 (A site) is in the ...

  

Source: Shen, Guoyin - High Pressure Collaborative Access Team (HPCAT), Carnegie Institution of Washington

 

Collection: Geosciences

 
8 Elastic anisotropy of FeSiO3 end-members of the perovskite and post-perovskite phases
 

Summary:  -spin until the post-perovskite phase transition. [4] In order to calculate the effect that incorporation... - order estimate. For such an assemblage, when going from perovskite to post-perovskite there is almost... Elastic anisotropy of FeSiO3 end-members of the ...

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
9 Please cite this article in press as: Czkov, H., et al., Implications of post-perovskite transport properties for coremantle dynamics. Phys. Earth Planet. In. (2009), doi:10.1016/j.pepi.2009.08.008
 

Summary:  not known. We have some indications that the viscos- ity of post-perovskite may be by up to 2­3 orders... . The viscosity in the cen- tral plume is by 1­2 orders of magnitude lower. Considering the perovskite to post-perovskite... Please cite this article in press as: Cízková, H., et ...

  

Source: Cerveny, Vlastislav - Department of Geophysics, Charles University in Prague

 

Collection: Geosciences

 
10 American Mineralogist, Volume 88, pages 11611164, 2003 0003-004X/03/00071161$05.00 1161
 

Summary:  + in pure MgSiO3 perovskite at ambient conditions. As for the "C" peak, simulation of the A-site peak... -coordinated "A" sites ([8] Mg) (Knittle and Jeanloz 1987; Zhang and Weidner 1999). After FeO and possibly Fe2O3... to a previous study (Stebbins et al. 2001), the B-site peak relaxed more slowly than the ...

  

Source: Nur, Amos - Department of Geophysics, Stanford University

 

Collection: Geosciences

 
11 Communication www.rsc.org/chemcomm
 

Summary:  ) temperatures from layered perovskite precursors. Similarly, A-site defective three-dimen- sional perovskites... of interlayer Na+ cations than are needed to fill the A-sites of a perovskite block, so divalent ion exchange... . Subsequent reduction can collapse the ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
12 2 High temperature elastic anisotropy of the perovskite and post-3 perovskite polymorphs of Al2O3
 

Summary:  of this percentage of Al2O3 162into MgSiO3 would increase the post-perovskite phase- 163transition, on the order of 0... -member MgSiO3 post-perovskite phase 187 exhibits shear-wave splitting on the order of about twenty 188... 2 High temperature elastic anisotropy of the perovskite and ...

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
13 This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research
 

Summary:  indications that the viscos- ity of post-perovskite may be by up to 2­3 orders of magnitude lower than... - tor Adisl is then chosen to produce the post-perovskite viscosity approximately 2 orders of magnitude... , where it drops by about an order of magnitude due to the pres- ence of the ...

  

Source: Matyska, Ctirad - Department of Geophysics, Charles University in Prague

 

Collection: Geosciences

 
14 The elasticity of the MgSiO3 post-perovskite phase in the Earth's
 

Summary:  - perovskite phase in the Earth's lowermost mantle T. Iitaka1 , K. Hirose2 , K. Kawamura2 & M. Murakami2 1... ............................................................................................................................................................................. MgSiO3 perovskite has been assumed to be the dominant com- ponent ...

  

Source: Voèadlo, Lidunka - Department Earth Sciences, University College London

 

Collection: Chemistry ; Geosciences

 
15 PHYSICAL REVIEW B 83, 134116 (2011) Theory of prospective perovskite ferroelectrics with double rocksalt order
 

Summary:  instead.17­19 A recent survey19 states that long-range A-site rocksalt ordering is known only for two... double perovskites in which both A and B sites exhibit rocksalt order. Of course, the local bonding envi... rocksalt order on the B site of a double perovskite ...

  

Source: Vanderbilt, David - Department of Physics and Astronomy, Rutgers University

 

Collection: Physics ; Materials Science

 
16 Journal of Solid State Chemistry 148, 3}15 (1999) Article ID jssc.1999.8190, available online at http://www.idealibrary.com on
 

Summary:  structures. LaYCaBa2 Cu2 xTi3 xO14 exhibits a large-small rare earth ordering on the A/A sites, like its... and undoped LaYCaBa2Cu2 xTi3 xO14 . These quintuple perovskites are members of a family of ordered perovskite... O structure has been recently pub- lished ...

  

Source: Marks, Laurence D. - Department of Materials Science and Engineering, Northwestern University; Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Chemistry ; Materials Science

 
17 This article was downloaded by:[Rappe, A. M.] [Rappe, A. M.]
 

Summary:  ) and ionic displacement (D0 ) for A-site ions found in ferroelectric perovskites. Ionic size... ), ionic size (R) and ionic displacement (D0 ) for A-site ions found in FE perovskites. Ionic size... are A-site driven while such classic ferroelectric perovskites as ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
18 Journal of Catalysis 249 (2007) 349358 www.elsevier.com/locate/jcat
 

Summary:  in Ba (see Table 1). This is consis- tent with extrusion of the excess A-site cation, possibly as Ba... of Pd(0), and the need to incorporate additional A-site cations all likely contribute to the greater... Journal of Catalysis 249 (2007) 349­358 www.elsevier.com/locate/jcat A Pd-doped perovskite catalyst

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
19 American Mineralogist, Volume 86, pages 10761080, 2001 0003-004X/01/00091076$05.00 1076
 

Summary:  -pressure perovskite with a planar (two-dimensional) ordering of A-site cations. Most pre- viously described high... ordering of K and Th over the "A-sites". Note that in our case, the degree of disorder (D) cannot... 1991). The high-pressure K-Th perovskite contains ...

  

Source: Chakhmouradian, Anton - Department of Geological Sciences, University of Manitoba

 

Collection: Geosciences

 
20 Crystal structure and dielectric properties of complex perovskite (Sr, Ba, Ca)(Ni0.5W0.5)O3
 

Summary:  of many complex perovskites, the A-site Sr2 + ions can be completely replaced by the Ba2 + or Ca2 + ions... form 16 January 2004; accepted 24 January 2004 Abstract A-site cation substitution with Ba2 + and Ca2... from monoclinic ! rhombohedral ! orthorhombic ! cubic with the corresponding A-site cation ...

  

Source: Messing, Gary L. - Department of Materials Science and Engineering, Pennsylvania State University

 

Collection: Materials Science


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21 Note: this file was made from SciFinder information Synthesis and Characterization of the First 1:2
 

Summary:  :2 ordered Perovskite Ruthenate J. Rijssenbeek, S. Malo, T. Saito, V. Caignaert, M. Azuma, M. Takano, K. R... and structural characterization of the 1st 1:2 ordered perovskite ruthenate, Sr3CaRu2O9. The structure was detd... :2 ordering of Ca21 and Ru51 over the six-coordinate B-sites of ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
22 E-mail address: rmitchel@gale.lakeheadu.ca The Canadian Mineralogist
 

Summary:  proposed that it crystallizes as an ordered quadruple perovskite (a = 7.767 Å) in the space group Pn3m (R... coordinated by atoms of oxygen. Larger A-site cations are surrounded by twelve atoms of oxygen in cubo... ) in Nb-rich titanates such as the mineral latrappite (Mitchell et al. 1998). The A-site ...

  

Source: Chakhmouradian, Anton - Department of Geological Sciences, University of Manitoba

 

Collection: Geosciences

 
23 ORIGINAL PAPER A. R. Chakhmouradian K. Ross
 

Summary:  -range order between the A-site ca- tions) or variation in structural distortion over the sample (e... re¯ections observed for the intermediate compounds may re¯ect short-range order between the A-site... is accompanied by increasing volumes of the A-site polyhedra, whereas the volume ...

  

Source: Chakhmouradian, Anton - Department of Geological Sciences, University of Manitoba

 

Collection: Geosciences

 
24 This paper is dedicated to Professor J. M. Honig, in thanks for his friendship, his scienti"c accomplishments, and his many years of service to
 

Summary:  the A-site ordered nondefective perovskites AEu Ti O (A"Ca, Sr) (15). Novel A-site defective cubic... dehydrate around 5003C to form A-site defective cubic perovskites. 2000 Acdemic Press INTRODUCTION... acids can be topochemically dehy- drated to form new ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
25 JOURNALDE PHYSIQUE IV ColIoqueC7,supplementau JournaldePhysique111, Volume 3, novembre1993
 

Summary:  is caused by the La deficieny itself and might be related to the existence of vacancies on the A-site... Structural and high temperature electrical properties of La,-,Sr,MnO3 perovskite materials E. SYSKAKIS... , Germany ABSTRACT. The phase constitution of Lay-xSrxMnOg perovskite materials with Osxs0.4 and 0.8sysl

  

Source: Ecole Polytechnique, Centre de mathématiques

 

Collection: Mathematics

 
26 13. Wysession, M. E., et al. in The Core-Mantle Boundary Region (eds Gurnis, M., Wysession, M. E., Knittle, E. & Buffett, B. A.) 273297 (American Geophysical Union, Washington DC, 1998).
 

Summary:  pressure elastic anisotropy of MgSiO3 perovskite and geophysical implications. Earth Planet. Sci. Lett. 164... , 2000). 21. Oganov, A. R., Brodholt, J. P. & Price, G. D. The elastic constants of MgSiO3 perovskite... , B. B., Cococcioni, M. & de Gironcoli, S. Thermoelastic properties of MgSiO3-perovskite: insights

  

Source: Oganov, Artem R. - Departments of Geosciences & Physics and Astronomy, SUNY at Stony Brook; Voèadlo, Lidunka - Department Earth Sciences, University College London

 

Collection: Chemistry ; Geosciences ; Materials Science ; Physics

 
27 ELSEVIER PhysicaC282-287(1997)959-960 Genesis of Superconductivity in the Layered Cuprates: (ACuOzs)2(ATiO3) m; 2 <__m _ 4 *
 

Summary:  . This report will focus solely on the m = 2 mixed A-site stoichiometryLn'Ln"BazCuzTi20n (Ln' = Nd, Ln" = Dy... perovskite Ln'Ln"BazCuzTi20,,(Im'Ln" = NdDy), such as solid solution behavior, stable defect species... in the electronic and structural features which stabilize two dimensional (layered) perovskite-like systems. X

  

Source: Marks, Laurence D. - Department of Materials Science and Engineering, Northwestern University; Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Chemistry ; Materials Science

 
28 A New Series of Layered Cuprates (ACuO2.5)2(ATiO3)m: Dy2Ba2Ca2Cu2Ti4O17, m ) 4
 

Summary:  as a perovskite other than (Ba, Sr, Ca)TiO3, and only a small amount of the 2-2-5 phase. In order to isolate... + and tetravalent Ti4+ requires the large divalent ion (such as Ba2+) to fill the large A-site cavity between CuO5... of the Ba2+ ions into the A-sites between Cu2+O5 and Ti4+O6 polyhedra combine ...

  

Source: Marks, Laurence D. - Department of Materials Science and Engineering, Northwestern University; Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Chemistry ; Materials Science

 
29 Cation non-stoichiometry in yttrium-doped barium zirconate: phase behavior, microstructure, and proton conductivity
 

Summary:  have investigated A-site non- stoichiometry in Ba1ÀxZr0.8Y0.2O3Àd, a candidate electrolyte material... -stoichiometry by incorporation of yttrium on the A-site. The dopant partitioning can explain the decrease in cell constant... , as captured in the phase diagram, Fig. 5. This behavior indicates that A-site vacancies are ...

  

Source: Jet Propulsion Laboratory, Thermoelectrics Team

 

Collection: Energy Storage, Conversion and Utilization ; Materials Science

 
30 Silver solid solution piezoelectrics Ilya Grinberga)
 

Summary:  the feasibility of using silver on the perovskite A-site in high-performance lead-free piezoelectrics... . Off-centering of the Pb atoms on the perovskite A-site has been shown to be crucial to the high... on the A-site, similar to the short covalent bonds found in many Pb-based ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
31 A "Chimie Douce" Sythesis of Perovskite-Type SrTa2O6 and
 

Summary:  + into the perovskite A-sites formed in the reaction. The observed powder pattern was accurately simulated as a three... -dimensional cubic perovskite, in which Sr2+ occupies half of the available A sites. An ordered structure, in which... A "Chimie Douce" Sythesis of Perovskite-Type ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
32 The effect of temperature on the seismic anisotropy of the perovskite and post-perovskite polymorphs of MgSiO3
 

Summary:  The effect of temperature on the seismic anisotropy of the perovskite and post-perovskite... that the seismic anisotropy of MgSiO3 perovskite is significantly temperature dependent. At 90 GPa, the direction... at 3500 K. We have also calculated the first set of high-temperature elastic constants of the new ...

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
33 Charge Transfer Model of Atomic Ordering in Complex Perovskite Alloys
 

Summary:  in an environment dependent effective A-site charge. This model successfully reproduces the long range order of both... l~VxV(i--x)/2 &nd II(i_3j)/2lVa;VI(i_.3j)/2 ordering. For these structure, the A-sites will have... Charge Transfer Model of Atomic Ordering in Complex ...

  

Source: Wu, Zhigang - Department of Physics, Colorado School of Mines

 

Collection: Geosciences

 
34 PLEASE SCROLL DOWN FOR ARTICLE This article was downloaded by: [Lin, Jung-Fu]
 

Summary:  and then to perovskite, has been recently proposed to occur at the bottom of the D region in order to account for double... -ray diffraction and X-ray emission studies on iron- bearing silicate perovskite under high pressures Jung-Fu Lina... -bearing silicate perovskite under high pressures', High Pressure ...

  

Source: Lin, Jung-Fu "Afu" - Department of Geological Sciences, University of Texas at Austin

 

Collection: Geosciences ; Materials Science

 
35 Journal of Solid State Chemistry 155, 216}224 (2000) doi:10.1006/jssc.2000.8936, available online at http://www.idealibrary.com on
 

Summary:  in layered cuprates (14). The smaller rare earth cation prefers to occupy the 8-coordinate (A) site between... at http://www.idealibrary.com on Quadruple and Quintuple Perovskite-Layered Cuprates (NdDyBa2 xSrxCu2 yTi2... +property relationships of chemically sub- stituted quadruple- and quintuple-layered cuprate ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
36 Chem. Mater. 1996, 7, 1355-1360 1355 Crystal Chemistry of Ln'Ln''Ba2Cu2Ti2011
 

Summary:  of the constituent lanthanides has been investigated. Powder X-ray data show that the mixed A-site compositions Ln... to govern which ordering system is favored. Many double perovskites containing copper have a random or rock... A-site stoichiometries Ln'Ln"Ba2Cu2- Ti2011(Ln =lanthanide, Y)are reported, ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
37 To whom correspondence should be addressed. Fax: 847-491-7820. E-mail: n-mansourian@nwu.edu.
 

Summary:  . The plots for the A-site doped and A- and B-site codoped quadruple samples in Fig. 3 suggest improvement... Figs. 4, 5). The material with the lowest slope in Fig. 5 belongs to the A-site doped LaY Ca Ba... ://www.idealibrary.com on Defect Analysis of Ionically Compensated Quadruple and Quintuple Perovskite Layered Cuprates with ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
38 Iron-rich perovskite in the Earth's lower mantle , J.F. Lin a
 

Summary:  Iron-rich perovskite in the Earth's lower mantle Z. Mao a, , J.F. Lin a , H.P. Scott b , H... 2011 Editor: L. Stixrude Keywords: Fe-bearing perovskite equation of state lower mantle bulk sound... velocity density The equations of state of perovskite with (Mg0.75,Fe0.25)SiO3 and MgSiO3 compositions have

  

Source: Lin, Jung-Fu "Afu" - Department of Geological Sciences, University of Texas at Austin

 

Collection: Geosciences ; Materials Science

 
39 Physics of the Earth and Planetary Interiors 174 (2009) 247253 Contents lists available at ScienceDirect
 

Summary:  ) A­A site (i.e., nominally between the Mg sites) pair for the trivalent­monovalent substitution, we... Fe+3 or Al+3 cation (Fig. 2c). Al in pv reduces the A- site considerably, and there is a parallel... predictions of potassium partitioning between Fe and Al-bearing MgSiO3 perovskite ...

  

Source: Steinle-Neumann, Gerd - Bayerisches Geoinstitut, Universität Bayreuth

 

Collection: Geosciences

 
40 Diploma work Masters project Examensarbete: Perovskite superlattices by pulsed laser
 

Summary:  perovskites (see right hand figure). Double perovskites contain ordered arrays of the B site transition metal... Diploma work ­ Masters project ­ Examensarbete: Perovskite superlattices by pulsed laser deposition... : playing LEGO with atoms Oxide materials based on the simple cubic ...

  

Source: Gunnarsson, Robert - Niels Bohr Institute & Department of Microtechnology and Nanoscience, Chalmers University of Technology,

 

Collection: Materials Science


Page:   1  2  3  4  5 
Page:   1  2  3  4  5 
 
41 Na2Ln2Ti3-xMnxO10 (Ln ) Sm, Eu, Gd, and Dy; 0 E x E 1): A New Series of Ion-Exchangeable Layered Perovskites
 

Summary:  and nondefective phases such as the A-site ordered perovskite CaEu2Ti3O9.19 Recently, we proposed the idea... to the topochemical synthesis of the A-site ordered perovskite CaEu2Ti3O9.19 Ion exchange of cationic structural units... -dimensional ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
42 Exfoliation of layered rutile and perovskite tungstates Raymond E. Schaak and Thomas E. Mallouk*
 

Summary:  in the perovskite block),9 we were able to prepare a new A-site defective Ruddlesden­Popper solid acid, H2W2O7... By starting with the double-layer Aurivillius-related phase Bi2W2O9 (which con- tains vacant A-sites... and vacant A-sites in the parent Bi2W2O9 phase.) The XRD pattern for H2W2O7, shown in Fig. ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
43 Catalysts and Fuel Mixing for Diesel Reformer in Fuel Cell Auxiliary Power Unit
 

Summary:  the A-site Oxygen B-site A-site Oxygen B-site Figure 1. Lattice structure of a single cell in perovskite... reforming using the existing commercial injector components. Development of Perovskite ATR Reforming... Catalysts We have been investigating new perovskite type of metal oxide ...

  

Source: Argonne National Laboratory, Chemical Sciences and Engineering Division, Fuel Cell Department

 

Collection: Energy Storage, Conversion and Utilization

 
44 Nonstoichiometry, Structure, and Electrical Properties of "SrPrO3" Mary A. Thundathil, Camille Y. Jones, G. Jeffrey Snyder, and Sossina M. Haile*,
 

Summary:  at the A site. Several ABO3 type perovskite oxides are known to accom- modate substantial concentrations of A-site... in projection on (010): (a) 80 K and (b) 300 K. For simplicity, the A-site atom has been labeled as "Sr... ignored in the Heikes formula),30 and possible exclusion of B cation sites located in the vicinity of ...

  

Source: Jet Propulsion Laboratory, Thermoelectrics Team

 

Collection: Energy Storage, Conversion and Utilization ; Materials Science

 
45 JOURNAL OF SOLID STATE CHEMISTRY 119, 80-89 (1995) High-Temperature Transport and Defect Studies of Quadruple
 

Summary:  the A-site (site lb) in the perovskite cell, while copper and titanium were distributed statistically... by a tetragonal subcell of dimensions la, X la, X 4a, (ap, cubic perovskite cell dimension). Oxygen vacancy order... which is related to the layered quadruple perovskites by ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
46 Vol. 34 (2003) ACTA PHYSICA POLONICA B No 2 EFFECT OF A-SITE CATION SIZE MISMATCH
 

Summary:  Vol. 34 (2003) ACTA PHYSICA POLONICA B No 2 EFFECT OF A-SITE CATION SIZE MISMATCH ON FIRST-ORDER... of the A-site cation radius variation #27; 2 on the ferromag- netic (FM) and metal#21;insulator (M#21;I... for 8h in air. The mixing ratios of AE ions were selected so as to keep the average A-site cation ...

  

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

 

Collection: Physics

 
47 Internal Chemistry of the Pure and Chemically Substituted Quadruple Perovskites LnLnBa2Cu2Ti2O11 (LnLn ) LaY
 

Summary:  systems, is directly related to the A-site order and is an important step toward achieving... Powder XRD results showed that the LnLn ) LaY compound adopted an ordered A-site arrangement... occupies the cation site between planes. The A-site order in the LnLn ) NdDy ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
48 Electronic spin transitions and the seismic properties of ferrous iron-bearing MgSiO3 post-perovskite
 

Summary:  Electronic spin transitions and the seismic properties of ferrous iron- bearing MgSiO3 post-perovskite... ; revised 22 February 2006; accepted 1 March 2006; published 6 April 2006. [1] The elastic constants of post-perovskite... ), Electronic spin transitions and the seismic properties of ferrous iron-bearing MgSiO3 post- ...

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
49 Ab initio study of silver niobate Ilya Grinberg* and Andrew M. Rappe*
 

Summary:  of the perovskite AgNbO3 to examine the feasibility of using silver on the perovskite A-site in lead... at the perovskite A-site at ambient pressure and temperature, three have been shown experimentally to exhibit off... atoms on the perovskite ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
50 Phase transition in MgSiO3 perovskite in the earth's lower mantle Taku Tsuchiya*, Jun Tsuchiya, Koichiro Umemoto, Renata M. Wentzcovitch
 

Summary:  Phase transition in MgSiO3 perovskite in the earth's lower mantle Taku Tsuchiya*, Jun Tsuchiya... April 2004; accepted 11 May 2004 Abstract A new polymorph of MgSiO3 more stable than the Pbnm-perovskite... to those in which a phase transition in MgSiO3-perovskite has been observed by in situ angle dispersive X

  

Source: Voèadlo, Lidunka - Department Earth Sciences, University College London

 

Collection: Chemistry ; Geosciences

 
51 Al2O3 incorporation in MgSiO3 perovskite and ilmenite Wendy R. Panero a,, Sofia Akber-Knutson b
 

Summary:  Al2O3 incorporation in MgSiO3 perovskite and ilmenite Wendy R. Panero a,, Sofia Akber-Knutson b... in the MgSiO3­Al2O3 system predict that MgSiO3­perovskite dissolves about 15 mol% Al2O3 at the top... effect on the elasticity of MgSiO3 perovskite. © 2006 Elsevier B.V. All rights reserved. Keywords

  

Source: Stixrude, Lars - Department of Geological Sciences, University of Michigan

 

Collection: Geosciences

 
52 ELSEVIER PhysicaC 282-287(1997)837-838 A New Series of Layered Pure Perovskites (ACuOzs)2(ATiOs). *
 

Summary:  PHYSICA@ ELSEVIER PhysicaC 282-287(1997)837-838 A New Series of Layered Pure Perovskites (ACuOzs)2... of layered "pure" perovskites (ACuOz_0z(ATiOs)m(m = 2 - 4) was found. The distance between CuOz planes can... perovskites LrI2Ba2Cu2M20n (M = Sn, Ti, La z= Laz - Tb2,LaY, NdDy), which have CuO2sheets separated by double

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
53 Half-metallic antiferromagnetic double perovskites: LaAVRuO6 ,,ACa, Sr, and Ba... J. H. Park, S. K. Kwon, and B. I. Min
 

Summary:  on the theoretical exploration of electronic structures, we propose that the ordered double perovskites LaAVRuO6... been speculated that mixed-cation double perovskites of AA BB O6 type might form ordered structures... , which shows the HM-AFM nature of all three systems. As is well known, ...

  

Source: Min, Byung Il - Department of Physics, Pohang University of Science and Technology

 

Collection: Materials Science ; Physics

 
54 10.1098/rsta.2002.1078 Computational mineral physics and the
 

Summary:  10.1098/rsta.2002.1078 Computational mineral physics and the physical properties of perovskite... constants of perovskite at lower-mantle temperatures and pressures are calculated using ab initio molecular... of 2000 km. The e¬ect of Al3+ on the compressibility of MgSiO3 perovskite is calculated using three di

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
55 Ab initio investigation of perovskite and post-perovskite CaPtO3 Samir F. Matar, Grard Demazeau, Alain Largeteau
 

Summary:  -25Sep2008 #12;Fig. 6. (color online) Post-perovskite PPV­MgSiO3: (a) site projected DOS and (b) Si... Ab initio investigation of perovskite and post-perovskite CaPtO3 Samir F. Matar, Gérard Demazeau... , Alain Largeteau Abstract For the recently synthesized ...

  

Source: Ecole Polytechnique, Centre de mathématiques

 

Collection: Mathematics

 
56 Ion-Exchangeable, Electronically Conducting Layered Perovskite Oxyfluorides
 

Summary:  themselves. There are reports of manipulating the A-site cations by high-temperature solid-state reations... that does not depend on special redox properties of the A-site cations and may thus be applicable... Ion-Exchangeable, Electronically Conducting Layered Perovskite Oxyfluorides Yoji Kobayashi

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
57 First-principles investigation of the highly tetragonal ferroelectric material Bi(Zn12Ti12)O3 Tingting Qi, Ilya Grinberg, and Andrew M. Rappe
 

Summary:  -cation ordering usually found in perovskites. We attribute this unusual preference to the large cation... reported,1­4 few form the perovskite structure under ambient conditions.5,6 In order to find better... with pre- vious results for the PZT solid solution,27 the A-site displace- ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
58 LJournal of Alloys and Compounds 307 (2000) 149156 www.elsevier.com/locate/jallcom
 

Summary:  structure with 2 2 1 indexed only on a doubled (face-centered) perovskite cell. planar ordering of A-site... of the A-site cations. The highest degree of ordering is observed in non-stoichiometric perovskites... to exhibit cation ordering at the ...

  

Source: Chakhmouradian, Anton - Department of Geological Sciences, University of Manitoba

 

Collection: Geosciences

 
59 Effects of a perovskite-post perovskite phase change near core-mantle boundary in compressible mantle convection
 

Summary:  Effects of a perovskite-post perovskite phase change near core-mantle boundary in compressible... mantle convection are used to investigate the effect of the perovskite to post-perovskite phase... of the mantle. The usual phase transitions at 410 km (olivine-spinel) and 660 km ...

  

Source: Tackley, Paul J. - Institut für Geophysik, Eidgenössische Technische Hochschule Zürich (ETHZ)

 

Collection: Geosciences

 
60 Structural, Chemical, and Electronic State on La0.7Sr0.3MnO3 Dense Thin-film Surfaces at High Temperature Surface Segregation
 

Summary:  promoted segregation of Sr by 12-20% on the A-site, accompanied by a smaller increase of (La+Sr)/Mn. Our... on the surface. However, the origin of the A-site segregation, the structure of the segregated surface... originate from different mechanisms including Sr enrichment at the A-site, i.e. Sr replacing La

  

Source: Yildiz, Bilge - Department of Nuclear Science and Engineering, Massachusetts Institute of Technology (MIT)

 

Collection: Materials Science ; Chemistry


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61 Effect of Al on the sharpness of the MgSiO3 perovskite to post-perovskite phase transition
 

Summary:  Effect of Al on the sharpness of the MgSiO3 perovskite to post-perovskite phase transition S. Akber... the influence of Al on the recently discovered perovskite to post-perovskite phase transition in MgSiO3. We... the perovskite-to-post-perovskite transition region to span 127­140 GPa, ...

  

Source: Asimow, Paul D. - Division of Geological and Planetary Sciences, California Institute of Technology,; Steinle-Neumann, Gerd - Bayerisches Geoinstitut, Universität Bayreuth

 

Collection: Geosciences

 
62 Electronic spin transitions in iron-bearing MgSiO3 perovskite Stephen Stackhouse , John P. Brodholt, G. David Price
 

Summary:  Electronic spin transitions in iron-bearing MgSiO3 perovskite Stephen Stackhouse , John P. Brodholt... in perovskites with the chemical composition Mg0.9375Fe0.0625SiO3, Mg0.8750Fe0.1250SiO3 and Mg0.9375Fe0.0625Si0... is found to be small. © 2006 Elsevier B.V. All rights reserved. Keywords: ab initio; iron; perovskite; spin

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
63 To whom correspondence should be addressed. Journal of Solid State Chemistry 161, 225}232 (2001)
 

Summary:  -style reactions, one can synthe- size perovskites that have controlled A-site vacancies (8), ordered A-site... in dilute acid (18). H¸nTiO topochemically dehydrates to form the A-site defective n"2 Ruddlesden} Popper... to a humidi5ed atomosphere. 2001 Academic Press INTRODUCTION ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
64 Preparation, Characterization, and Ferroelectric Properties of the Alkylamine-Intercalated Layered
 

Summary:  Perovskite-Type Oxides (CnH2n+1NH3-Sr2Nb3O10, n ) 1-6) Zhaohui Zhong, Weiping Ding, Wenhua Hou,* and Yi Chen... of alkylamine-intercalated layered perovskite-type oxides, CnH2n+1NH3-Sr2Nb3O10 (n ) 1-6), were prepared through... between the perovskite layers. Infrared spectra (IR) and Raman spectra of the samples revealed the ...

  

Source: Zhong, Zhaohui - Department of Electrical Engineering and Computer Science, University of Michigan

 

Collection: Materials Science ; Engineering

 
65 Sound velocities and elasticity of aluminous MgSiO3 perovskite: Implications for aluminum heterogeneity in Earth's lower mantle
 

Summary:  Sound velocities and elasticity of aluminous MgSiO3 perovskite: Implications for aluminum... a remarkably strong effect on the thermoelastic properties of MgSiO3 perovskite. However, the sound velocities... of aluminous MgSiO3 perovskite have not been previously measured, even though this phase likely dominates most

  

Source: Jackson, Jennifer M. - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collection: Geosciences

 
66 New Prospects for High Performance SONAR, Chemical Sensor, and Communication Device Materials
 

Summary:  that arises due to the changes in the local structure of the perovskite A-site and leads to an enhanced... cation' motion. This mechanism is due to a size mismatch on the perovskite A-site between the large... of a perovskite with a large cation on the perovskite ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
67 Optical properties of deep-earth minerals 1 Optical properties of deep-earth minerals
 

Summary:  -linked SiO6 octahedra (B site). Magne- sium and ferrous iron (Fe2+ ) occupy the dodecahe- dra (A site... 's mass and is thought to consist of about 80% silicate perovskite [(Mg,Fe)SiO3] and 20% fer- ropericlase... exhibits an orthorhombic deviation from the ideal cubic-perovskite symmetry due to tilting of ...

  

Source: Jacobsen, Steven D. - Department of Earth and Planetary Sciences, Northwestern University

 

Collection: Geosciences

 
68 American Mineralogist, Volume 90, pages 199205, 2005 0003-004X/05/0001199$05.00/DOI:10.2138/am.2005.1633 199
 

Summary:  .2005.1633 199 INTRODUCTION Iron-bearing magnesium silicate perovskite, coexisting with small amounts... of (Mg,Fe)O ferropericlase and CaSiO3 perovskite, is thought to be the most abundant phase in Earths... perovskite, because it can affect electrostatic charge balance and equilibrium defect concentra- tions

  

Source: Jackson, Jennifer M. - Division of Geological and Planetary Sciences, California Institute of Technology; Shen, Guoyin - High Pressure Collaborative Access Team (HPCAT), Carnegie Institution of Washington

 

Collection: Geosciences

 
69 Accelerated Modeling and New Ferroelectric Materials for Naval SONAR Ilya Grinberg, Valentino R. Cooper,
 

Summary:  have shown that Ag cations can be ferroelectrically active on the perovskite A- site. Alloying AgNbO3... is disfavored by large octahedral rotations[28,29] . Elimination of Pb atoms from the A-site makes a material... .0° in 50/50 PZT[22] ). Finally, the presence of the Pb atoms on the ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
70 High-pressure sound velocities and elasticity of aluminous MgSiO3 perovskite to 45 GPa: Implications for lateral heterogeneity in Earth's
 

Summary:  High-pressure sound velocities and elasticity of aluminous MgSiO3 perovskite to 45 GPa... magnesium silicate perovskite, arguably the most abundant phase in Earth, have been performed to 45 GPa... media. The experiments were performed on a polycrystalline sample of aluminous MgSiO3 perovskite

  

Source: Jackson, Jennifer M. - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collection: Geosciences

 
71 Prying Apart Ruddlesden-Popper Phases: Exfoliation into Sheets and Nanotubes for Assembly of Perovskite
 

Summary:  the topochemical reactions that convert lamellar phases into A-site defec- tive21,22,25,37 and nondefective38 three... of Perovskite Thin Films Raymond E. Schaak and Thomas E. Mallouk* Department of Chemistry, The Pennsylvania... )] surface, forming perovskite monolayers. Above pH 9.5, TBAxH2-xSrLaTi2TaO10 sheets tile to densely ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
72 Predicted glide systems and crystal preferred orientations of polycrystalline silicate Mg-Perovskite at high pressure: Implications for the seismic anisotropy in the
 

Summary:  Predicted glide systems and crystal preferred orientations of polycrystalline silicate Mg-Perovskite... : Perovskite ab initio dislocation creep glide systems crystal preferred orientation seismic anisotropy lower... to glide, characterized by the Peierls stress, of glide systems for end-member MgSiO3 Perovskite at mantle

  

Source: Tommasi, Andrea - Laboratoire Geosciences, Université Montpellier II

 

Collection: Geosciences

 
73 carbides. The multiphase/polytypic region can be expected to occur also in the nitrides because
 

Summary:  Perovskite to 2300-Kilometer Depth in Earth's Mantle Sang-Heon Shim,1 * Thomas S. Duffy,1 Guoyin Shen2... of the planet. (Mg,Fe)SiO3 perovskite is expected to be the dominant mineral in the deep mantle, but ex... -ray diffraction observations of (Mg,Fe)SiO3 perovskite at conditions (50 to 106 gigapascals, 1600 to 2400 kelvin

  

Source: Duffy, Thomas S. - Department of Geosciences, Princeton University; Shen, Guoyin - High Pressure Collaborative Access Team (HPCAT), Carnegie Institution of Washington

 

Collection: Geosciences

 
74 Physics of the Earth and Planetary Interiors 155 (2006) 249259 Elasticity of CaSiO3 perovskite at high pressure
 

Summary:  Physics of the Earth and Planetary Interiors 155 (2006) 249­259 Elasticity of CaSiO3 perovskite... by (/0) = (V/V0)T in which 0 = 2.89 × 10-5 K-1 and T = 4.09(5). Using the third order Birch Murnaghan... in shear modulus. The bulk modulus of CaSiO3 perovskite is up to 10% lower than MgSiO3 perovskite under

  

Source: Alfè, Dario - Departments of Earth Sciences & Physics and Astronomy, University College London

 

Collection: Physics ; Geosciences

 
75 Physics of the Earth and Planetary Interiors xxx (2006) xxxxxx Elasticity of CaSiO3 perovskite at high pressure
 

Summary:  Physics of the Earth and Planetary Interiors xxx (2006) xxx­xxx Elasticity of CaSiO3 perovskite... by (/0) = (V/V0)T in which 0 = 2.89 × 10-5 K-1 and T = 4.09(5). Using the third order Birch Murnaghan... in shear modulus. The bulk modulus of CaSiO3 perovskite is up to 10% lower than MgSiO3 perovskite under

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences

 
76 GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, The Effect of Al on the Sharpness of the MgSiO3
 

Summary:  of the MgSiO3 Perovskite to Post-Perovskite Phase Transition S. Akber-Knutson, 1 G. Steinle-Neumann, 2 P. D... of static ab-initio computations we investigate the influence of Al on the recently discovered perovskite... to post-perovskite phase transition in MgSiO3. We examine three substitution mechanisms ...

  

Source: Barr, Al - Computer Science Department, California Institute of Technology; California Institute of Technology, Center for Advanced Computing Research, Center for Simulation of Dynamic Response of Materials

 

Collection: Computer Technologies and Information Sciences ; Materials Science

 
77 VOLUME 81, NUMBER 6 P H Y S I C A L R E V I E W L E T T E R S 10 AUGUST 1998 Electrostatic Model of Atomic Ordering in Complex Perovskite Alloys
 

Summary:  of Atomic Ordering in Complex Perovskite Alloys L. Bellaiche and David Vanderbilt Department of Physics... of the complicated ordering behavior of complex perovskite alloys, thereby provid- ing strong evidence... but will not change the nature of the order itself. While we have chosen to ...

  

Source: Vanderbilt, David - Department of Physics and Astronomy, Rutgers University

 

Collection: Physics ; Materials Science

 
78 Electronic structures and magnetic properties of LaAVMoO6 ,,A=Ca,Sr,Ba...: Investigation of possible half-metallic antiferromagnets
 

Summary:  to the ordered double- perovskite structure LaAVMoO6, in which each Mo atom has six V neighbors, and vice versa... .54 B for Ca, Sr, and Ba systems, respectively. It is also seen that, irrespective of A-site atoms... have shown that the ordered double perovskite system LaAVMoO6 A=Ca,Sr,Ba ...

  

Source: Min, Byung Il - Department of Physics, Pohang University of Science and Technology

 

Collection: Materials Science ; Physics

 
79 Charge-transfer electrostatic model of compositional order in perovskite alloys Zhigang Wu and Henry Krakauer
 

Summary:  shows 111 1:1 B-site ordering at all measured temperatures, and 001 1:1 A-site ordering occurs below 950... -site model. As seen in Fig. 3, weak 001 1:1 A-site ordering is also obtained in the simulations, in agreement... with measure- ments on samples annealed below 950 °C.9 Perfect 001 ...

  

Source: Wu, Zhigang - Department of Physics, Colorado School of Mines

 

Collection: Geosciences

 
80 PhysChemMinerals(1993)20:15%170 PHYRICS[CHEMISTRY
 

Summary:  spectroscopic and calorimetric results on CaTiO3-perovskite, in order to bring new insights on the thermodynamic... on the Properties of MgSiO3 Perovskite Philippe Gillet 1,,, Francois Guyot 2, Geoffrey D. Price 3, Benoit Tournerie... - tortion with increasing temperature. These data are com- pared to those available for ...

  

Source: Price, G. David - Department Earth Sciences, University College London

 

Collection: Materials Science ; Geosciences


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81 Eur. J. Mineral. 2007, 19, 533546
 

Summary:  (in agreement with Dowty's model). Among isovalent A-site cations, the larger partition into the {100... ). This habit results from {111} being the domi- Fig. 6. Morphology and A-site bonding topology of growing... } face. A-site cations attached to the surface are indicated by purple spheres; their bonding configu

  

Source: Chakhmouradian, Anton - Department of Geological Sciences, University of Manitoba

 

Collection: Geosciences

 
82 Physics of the Earth and Planetary Interiors 140 (2003) 277291 Mantle tomography and its relation to temperature
 

Summary:  of a mixture of perovskite and magnesio-wüstite. In a first stage, we directly invert VP and VS anomalies... of the mantle, variations in the volumic fraction of perovskite from -14 to 10% are essential to explain seismic... tomography. In the mid-mantle, anomalies of perovskite are not required, but moderate variations (up to ...

  

Source: Deschamps, Frédéric - Institut für Geophysik, Eidgenössische Technische Hochschule Zürich (ETHZ); Utrecht, Universiteit - Faculty of Geosciences, Seismology Group

 

Collection: Geosciences

 
83 Available online at www.sciencedirect.com Physics of the Earth and Planetary Interiors 170 (2008) 248259
 

Summary:  including ferropericlase, silicate perovskite, and possibly in post-perovskite at lower-mantle pressures... crossover in silicate perovskite at high pressures, but which valence state of iron undergoes the spin... ; Ferropericlase; Silicate perovskite 1. Introduction Earth

  

Source: Lin, Jung-Fu "Afu" - Department of Geological Sciences, University of Texas at Austin

 

Collection: Geosciences ; Materials Science

 
84 Three-dimensional structures and dynamics in the deep mantle: Effects of post-perovskite phase change and deep mantle layering
 

Summary:  Three-dimensional structures and dynamics in the deep mantle: Effects of post-perovskite phase... simulations of thermo- chemical mantle convection with multiple phase transitions (olivine-spinel-perovskite... -post perovskite) are used to investigate the morphology of compositional and post- perovskite (PPV) ...

  

Source: Tackley, Paul J. - Institut für Geophysik, Eidgenössische Technische Hochschule Zürich (ETHZ)

 

Collection: Geosciences

 
85 Communications Self-assembly of Tiled Perovskite
 

Summary:  intercalation compound of HA2Nb3O10 (A ) Ca, Sr) that has perovskite-block A-site cations ordered in successive... O10, with the A-site cations ordered in their respective layers. The thicknesses of the layers... Communications Self-assembly of Tiled Perovskite ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
86 General introduction 1.1 Multiferroic materials
 

Summary:  . In manganites, the magnetic ground state as a function of the size of the A-site cation shows a rich be- haviour... that gives rise to different magnetic structures. Changing the size of the A-site cation by choosing... class of materials exhibiting coexistence of two or more ferroic orders (ferromagnetism

  

Source: Groningen, Rijksuniversiteit - Centre for Ecological and Evolutionary Studies, Department of Marine Benthic Ecology and Evolution,

 

Collection: Biology and Medicine ; Environmental Sciences and Ecology

 
87 Subscriber access provided by University Libraries | University of Notre Dame Industrial & Engineering Chemistry Research is published by the American
 

Summary:  at the A-site not only defines perovskite Figure 3. Polarization curves of methanol oxidation by different... combustion synthesis technique, a variety of complex, i.e., perovskites/ platinum (ABO3/Pt), catalysts were... perovskites (ABO3), which have an excellent proton transport property, as basic elements ...

  

Source: Mukasyan, Alexander - Department of Chemical and Biomolecular Engineering, University of Notre Dame

 

Collection: Materials Science

 
88 Site and Oxidation-State Specificity Yielding Dimensional Control in Perovskite Ruthenates
 

Summary:  -sites of the perovskite lattice (Figure 1). Similarly ordered materials based on Nb5+ or Ta5+ are known and serve as good... be modeled by a 2:1 ordered perovskite framework with untilted octahedra8 using the trigonal space group P-3m... Ruddlesden-Popper structure, wherein the Ca2+ and Sr2+ occupy the ...

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
89 Behavior of iron in (Mg,Fe)SiO3 post-perovskite assemblages at Mbar pressures
 

Summary:  Behavior of iron in (Mg,Fe)SiO3 post-perovskite assemblages at Mbar pressures Jennifer M. Jackson,1... - perovskite (PPv) structured (57 Fe,Mg)SiO3 has been measured in-situ at 1.12 and 1.19 Mbar at room... . Sturhahn, O. Tschauner, M. Lerche, and Y. Fei (2009), Behavior of iron in (Mg,Fe)SiO3 post-perovskite

  

Source: Jackson, Jennifer M. - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collection: Geosciences

 
90 Akimotoite to perovskite phase transition in MgSiO3 R. M. Wentzcovitch,1
 

Summary:  Akimotoite to perovskite phase transition in MgSiO3 R. M. Wentzcovitch,1 L. Stixrude,2 B. B. Karki... ; published 25 May 2004. [1] The akimotoite to perovskite phase transition of MgSiO3 is shown by first... to the larger density of states of low frequency vibrations in the perovskite phase. Such vibrations consist

  

Source: Stixrude, Lars - Department of Geological Sciences, University of Michigan

 

Collection: Geosciences

 
91 Exchange Bias Driven by the Dzyaloshinskii-Moriya Interaction and Ferroelectric Polarization at G-Type Antiferromagnetic Perovskite Interfaces
 

Summary:  by the oxygen octahedron tilting. Usually, the A-site cations in perovskites are too small to maintain a stable... ) in multiferroic materials with spiral spin order [10]. In perovskites, the DM interaction is determined... -Type Antiferromagnetic Perovskite Interfaces Shuai Dong,1,2,3 ...

  

Source: Tennessee, University of - Department of Physics and Astronomy, Correlated Electrons Group

 

Collection: Physics

 
92 Proton-Conducting Films of Nanoscale Ribbons Formed by Exfoliation of the Layer Perovskite H2SrTa2O7
 

Summary:  perovskites can also undergo a topochemical dehy- dration reaction, collapsing the layers and leaving A-site... of some A-site Sr2+ cations. Oriented films of these ribbons can be grown layer-by- layer, by alternate... Proton-Conducting Films of Nanoscale Ribbons Formed by Exfoliation of the Layer Perovskite ...

  

Source: Mallouk, Thomas E.- Department of Chemistry, Pennsylvania State University

 

Collection: Materials Science ; Chemistry

 
93 High Pressure Transformation of La4Cu3MoO12 to a Layered Perovskite
 

Summary:  High Pressure Transformation of La4Cu3MoO12 to a Layered Perovskite Douglas A. Vander Griend... it stabilizes the perovskite structure. In this paper, we describe the HP synthesis of a new copper-rich layered... perovskite, La4Cu3MoO12, which is isotypic with La2- CuSnO6.1 When synthesized at ambient pressure (AP

  

Source: Poeppelmeier, Kenneth R. - Department of Chemistry, Northwestern University

 

Collection: Materials Science ; Chemistry

 
94 Correlations between tetragonality, polarization, and ionic displacement in PbTiO3-derived ferroelectric perovskite solid solutions
 

Summary:  data P2 , average A-site off- center displacement squared DA 2 and average B-site off- center... on A-site displacement, and that the correlation between c/a-1 and DA 2 comes from the coupling between... .4. The overestimation of the A-site contribution in the fit of s data to P2 weakens the correlation and leads

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
95 Crystal Growth and Magnetic Properties of Lanthanide-Containing Osmium Double Perovskites, Ln2NaOsO6 (Ln ) La, Pr, Nd)
 

Summary:  earth cation. Only a limited number of double perovskites with rare earth cations on the A-site have... double perovskite structure type. This space group allows for a 1:1 ordered arrangement of the B and B... Crystal Growth and Magnetic Properties of Lanthanide-Containing Osmium Double ...

  

Source: Prozorov, Ruslan - Ames Laboratory & Department of Physics and Astronomy, Iowa State University

 

Collection: Physics

 
96 PHYSICAL REVIEW B 83, 144112 (2011) Pb-free ferroelectrics investigated with density functional theory: SnAl1/2Nb1/2O3 perovskites
 

Summary:  to investigate the replacement of the Pb atom on the perovskite A-site, motivated by the desire to replace... solutions of (Ba1-xSnx)TiO3 can be cleanly obtained up to x = 0.2 (Refs. 10 and 11). A-site substitution... -based perovskites. The standard model33­35 predicts the rocksalt Al/Nb ...

  

Source: Rappe, Andrew M. - Departments of Chemistry & Materials Science and Engineering, University of Pennsylvania

 

Collection: Materials Science ; Chemistry

 
97 Scale limits on free-silica seismic scatterers in the lower mantle # Craig R. Bina[1]
 

Summary:  otherwise dominated by silicate perovskite. Free silica phases such as stishovite are expected to generate... perovskite. Thus, any free silica phases preserved in the lower mantle may persist as armored relics... perovskite. This parallels the situation in crustal metamorphic rocks where, for ex- ample, staurolite

  

Source: Bina, Craig R. - Department of Earth and Planetary Sciences, Northwestern University

 

Collection: Geosciences

 
98 Multiferroics are materials that display spontaneous ferroelectric and magnetic ordering at the same time. Magnetoelectrics are materials in which an electric polarization can be induced by an
 

Summary:  of the A-site spins might stabilize the Mn-spiral in the bc plane, giving rise to spontaneous polarization... Summary Multiferroics are materials that display spontaneous ferroelectric and magnetic ordering... by spiral magnetic ordering. In this thesis, we mainly focus on investigating the magnetoelectric coupling

  

Source: Groningen, Rijksuniversiteit - Centre for Ecological and Evolutionary Studies, Department of Marine Benthic Ecology and Evolution,

 

Collection: Biology and Medicine ; Environmental Sciences and Ecology

 
99 Physics of the Earth and Planetary Interiors 174 (2009) 2432 Contents lists available at ScienceDirect
 

Summary:  refinements indicate iron occupies the dodecahedral (A) site, with- out detectable iron in the octahedral (B... absorption in ferropericlase (Mg,Fe)O, and silicate perovskite (Mg,Fe)SiO3, has been determined in the IR... in (Mg,Fe)SiO3. Intervalence charge-transfer transitions in silicate perovskite shift to ...

  

Source: Jacobsen, Steven D. - Department of Earth and Planetary Sciences, Northwestern University

 

Collection: Geosciences

 
100 SH velocity and compositional models near the 660-km discontinuity beneath South America and northeast Asia
 

Summary:  by the first-order transformation from garnet to perovskite. The deeper discontinuity is controlled... of garnet to perovskite persisting to greater depths. The velocity jump across the 660-km discontinuity... the discontinuity beneath northeast Asia requires a larger fraction of garnet transforming to ...

  

Source: Wen, Lianxing - Department of Geosciences, SUNY at Stony Brook

 

Collection: Geosciences


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