Synthesis and crystal structures of CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12}

Yamane, Hisanori; Tanimura, Ryouji; Yamada, Takahiro; Takahashi, Junichi; Kajiwara, Takashi; Shimada, Masahiko

doi:10.1016/j.jssc.2005.10.023

Title: Synthesis and crystal structures of CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12}

Full Record
Other Related Research

Abstract

New compounds CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12} were prepared by heating mixtures of CaCO{sub 3}, Y{sub 2}O{sub 3} and GeO{sub 2} at 1200 deg. C. CaY{sub 2}Ge{sub 3}O{sub 10} is stable at 1300 deg. C, while CaY{sub 2}Ge{sub 4}O{sub 12} decomposes into a melt and CaY{sub 2}Ge{sub 3}O{sub 10} at approximately 1250 deg. C. We obtained single crystals of CaY{sub 2}Ge{sub 3}O{sub 10} by cooling a sample with an initial composition of Ca:Y:Ge=1:2:8 from 1300 deg. C with a rate of -6 deg. C/h. The crystal structure of CaY{sub 2}Ge{sub 3}O{sub 10} was determined by single crystal X-ray diffraction. CaY{sub 2}Ge{sub 3}O{sub 10} crystallizes in the monoclinic space group P2{sub 1}/c with a=6.0906(8), b=6.8329(8), c=18.752(2)A and {beta}=109.140(3){sup o}, Z=4, and R{sub 1}=0.029 for I>2{sigma}(I). In the structure of CaY{sub 2}Ge{sub 3}O{sub 10}, Ca and Y atoms are situated disorderly in three 7-fold coordination sites between isolated germanate groups of triple GeO{sub 4} tetrahedra, Ge{sub 3}O{sub 10}. The structural formula of CaY{sub 2}Ge{sub 3}O{sub 10} is expressed as (Ca{sub 0.45}Y{sub 0.55})(Ca{sub 0.46}Y{sub 0.54})(Ca{sub 0.09}Y{sub 0.91})Ge{sub 3}O{sub 10}. The crystal structure of CaY{sub 2}Ge{sub 4}O{sub 12} was analyzed by the Rietveld method for the X-ray powder diffraction pattern.more »« less

Authors:

Yamane, Hisanori ^[1]; Tanimura, Ryouji ^[1]; Yamada, Takahiro ^[2]; Takahashi, Junichi ^[2]; Kajiwara, Takashi ^[3]; Shimada, Masahiko ^[4]

Center for Interdisciplinary Research, Tohoku University, 6-3 Aramaki, Aoba, Aoba-ku, Sendai 980-8578 (Japan)
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan)
Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki, Aoba, Aoba-ku, Sendai 980-8578 (Japan)
Akita National College of Technology, 1-1 Bunkyo-cho Iijima, Akita 011-8511 (Japan)

Publication Date:: Sun Jan 15 00:00:00 EST 2006

OSTI Identifier:: 20784860

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry

Additional Journal Information:: Journal Volume: 179; Journal Issue: 1; Other Information: DOI: 10.1016/j.jssc.2005.10.023; PII: S0022-4596(05)00477-9; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CALCIUM CARBONATES; GERMANATES; GERMANIUM OXIDES; LAYERS; MONOCLINIC LATTICES; MONOCRYSTALS; ORTHORHOMBIC LATTICES; SPACE GROUPS; SYNTHESIS; X-RAY DIFFRACTION; YTTRIUM OXIDES

Citation Formats


                    Yamane, Hisanori, Tanimura, Ryouji, Yamada, Takahiro, Takahashi, Junichi, Kajiwara, Takashi, and Shimada, Masahiko. Synthesis and crystal structures of CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12}.  United States: N. p., 2006. 
        Web.  doi:10.1016/j.jssc.2005.10.023.

Copy to clipboard


                    Yamane, Hisanori, Tanimura, Ryouji, Yamada, Takahiro, Takahashi, Junichi, Kajiwara, Takashi, & Shimada, Masahiko. Synthesis and crystal structures of CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12}.  United States.  https://doi.org/10.1016/j.jssc.2005.10.023

Copy to clipboard


                    Yamane, Hisanori, Tanimura, Ryouji, Yamada, Takahiro, Takahashi, Junichi, Kajiwara, Takashi, and Shimada, Masahiko. 2006.  
        "Synthesis and crystal structures of CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12}".  United States.  https://doi.org/10.1016/j.jssc.2005.10.023.

Copy to clipboard


                    
@article{osti_20784860,

  title        = {Synthesis and crystal structures of CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12}},

  author       = {Yamane, Hisanori and Tanimura, Ryouji and Yamada, Takahiro and Takahashi, Junichi and Kajiwara, Takashi and Shimada, Masahiko},

  abstractNote = {New compounds CaY{sub 2}Ge{sub 3}O{sub 10} and CaY{sub 2}Ge{sub 4}O{sub 12} were prepared by heating mixtures of CaCO{sub 3}, Y{sub 2}O{sub 3} and GeO{sub 2} at 1200 deg. C. CaY{sub 2}Ge{sub 3}O{sub 10} is stable at 1300 deg. C, while CaY{sub 2}Ge{sub 4}O{sub 12} decomposes into a melt and CaY{sub 2}Ge{sub 3}O{sub 10} at approximately 1250 deg. C. We obtained single crystals of CaY{sub 2}Ge{sub 3}O{sub 10} by cooling a sample with an initial composition of Ca:Y:Ge=1:2:8 from 1300 deg. C with a rate of -6 deg. C/h. The crystal structure of CaY{sub 2}Ge{sub 3}O{sub 10} was determined by single crystal X-ray diffraction. CaY{sub 2}Ge{sub 3}O{sub 10} crystallizes in the monoclinic space group P2{sub 1}/c with a=6.0906(8), b=6.8329(8), c=18.752(2)A and {beta}=109.140(3){sup o}, Z=4, and R{sub 1}=0.029 for I>2{sigma}(I). In the structure of CaY{sub 2}Ge{sub 3}O{sub 10}, Ca and Y atoms are situated disorderly in three 7-fold coordination sites between isolated germanate groups of triple GeO{sub 4} tetrahedra, Ge{sub 3}O{sub 10}. The structural formula of CaY{sub 2}Ge{sub 3}O{sub 10} is expressed as (Ca{sub 0.45}Y{sub 0.55})(Ca{sub 0.46}Y{sub 0.54})(Ca{sub 0.09}Y{sub 0.91})Ge{sub 3}O{sub 10}. The crystal structure of CaY{sub 2}Ge{sub 4}O{sub 12} was analyzed by the Rietveld method for the X-ray powder diffraction pattern. CaY{sub 2}Ge{sub 4}O{sub 12} is isotypic with SrNa{sub 2}P{sub 4}O{sub 12}, crystallizing in the orthorhombic space group P4/nbm, a=9.99282(6), c=5.06701(4)A, Z=2, R{sub wp}=0.092, R{sub p}=0.067. CaY{sub 2}Ge{sub 4}O{sub 12} contains four-membered GeO{sub 4}-tetrahedra rings, Ge{sub 4}O{sub 12}. Eight-fold coordinated square-anitiprism sites and 6-fold octahedral sites between the layers of the Ge{sub 4}O{sub 12} rings are occupied by Y atom and Ca/Y atoms, respectively The structural formula is Y(Ca{sub 0.5}Y{sub 0.5}){sub 2}Ge{sub 4}O{sub 12}.},

  doi          = {10.1016/j.jssc.2005.10.023},

  url          = {https://www.osti.gov/biblio/20784860},
  journal      = {Journal of Solid State Chemistry},

  issn         = {0022-4596},

  number       = 1,

  volume       = 179,

  place        = {United States},

  year         = {Sun Jan 15 00:00:00 EST 2006},

  month        = {Sun Jan 15 00:00:00 EST 2006}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1016/j.jssc.2005.10.023

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Synthesis and structural characterization of two new rare-earth manganese germanates: CeMn{sub 2}Ge{sub 4}O{sub 12} and GdMnGe{sub 2}O{sub 7}

Journal Article Taviot-Gueho, C; Leone, P; Palvadeau, P; ... - Journal of Solid State Chemistry

Crystals of Ce{sup +4}Mn{sub 2}{sup +2}Ge{sub 4}O{sub 12} and Gd{sup +3}Mn{sup +3}Ge{sub 2}O{sub 7} were obtained during the exploration of the quaternary Ln-Mn-Ge-O system. Their structures have been determined by single-crystal X-ray diffraction: CeMn{sub 2}Ge{sub 4}O{sub 12} crystallizes in the tetragonal space group P4/nbm with a = 9.816(1) {angstrom}, c = 4.888(1) {angstrom}, Z = 2, and R = 0.026 while GdMnGe{sub 2}O{sub 7} crystallizes in the orthorhombic space group A222 with a = 4.735(1) {angstrom}, b = 7.839(2) {angstrom}, c = 13.500(3) {angstrom}, Z = 4, and R = 0.048. Both frameworks are built up from the same polyhedra,more »« less
https://doi.org/10.1006/jssc.1998.7939
Synthesis, crystal structure and luminescence properties of CaY{sub 2−x}Eu{sub x}Ge{sub 3}O{sub 10} (x=0–2)

Journal Article Surat, Ludmila; Melkozerova, Marina; Tyutyunnik, Alexander; ... - Journal of Solid State Chemistry

The novel red emitting phosphors based on CaY{sub 2−x}Eu{sub x}Ge{sub 3}O{sub 10} (x=0–2) have been prepared using both a conventional solid-state reaction and a synthesis route via EDTA-complexing process. Powder XRD study has revealed that CaY{sub 2−x}Eu{sub x}Ge{sub 3}O{sub 10} (x=0.1–0.8, 2.0) crystallizes in the monoclinic space group P2{sub 1}/c, Z=4. The trivalent europium ions occupy three different sites (4e) with the C{sub 1} symmetry. The phosphors exhibit a strong red emission under excitations at 250 nm and 393 nm. The light emission efficiency depends on the excitation wavelength, the activator content and the method of synthesis. Appropriate CIE chromaticitymore »« less
https://doi.org/10.1016/J.JSSC.2013.08.002
Structural chemistry and magnetic properties of Y{sub 2}CoGe{sub 4}O{sub 12}

Journal Article Liu, Xiao-Qiang; Ridout, Joe; Xu, Diming; ... - Journal of Solid State Chemistry

Polycrystalline Y{sub 2}CoGe{sub 4}O{sub 12} has been prepared by standard ceramic methods. The crystal structure (space group P4/nbm; a=9.8465(2), c=4.92986(9) Å) consists of metal-rich layers separated from each other by Ge{sub 4}O{sub 12} groups comprised of four corner-sharing GeO{sub 4} tetrahedra. Two cation sites lie within the layers; an eight-coordinate site occupied by yttrium and a six-coordinate site occupied by a 1:1 disordered distribution of yttrium and cobalt. Neutron diffraction revealed two-fold disorder on the oxide sublattice; this has been elucidated using Co K-edge EXAFS spectroscopy. The availability of two sites allows each oxide ion to accommodate the coordination preferencesmore »« less
https://doi.org/10.1016/J.JSSC.2015.04.033
CuYb{sub 2}Ge{sub 4}O{sub 12}, a new bidimensionally tunneled structure

Journal Article Campa, J; Cascales, C; Gueierrez-Puebla, E; ... - Journal of Solid State Chemistry

Employing CuO as self flux crystals of CuYb{sub 2}Ge{sub 4}O{sub 12} have been grown for the first time. The crystal structure of CuYb{sub 2}Ge{sub 4}O{sub 12} has been determined by single-crystal X-ray diffraction in the triclinic P1 (No. 2) space group to an R value of 6.1%, with (a) = 7.156(2) {Angstrom}, (b) = 7.937(3) {Angstrom}, (c) = 4.905(3) {Angstrom}, {alpha} = 86.63(3){degrees}, {Beta} = 102.41(4){degrees}, {gamma}=1114.12(3){degrees}, V = 248.2(2) {Angstrom}{sup 3}, Z = 1, and D{sub c} = 5.97 gcm{sup {minus}3}. The novel tridimensional CuYb{sub 2}Ge{sub 4}O{sub 12} structure type can be conceived as formed by layers of (GeO{submore »« less
https://doi.org/10.1006/jssc.1996.0201
Energy levels and laser action in Nd : CaY/sub 2/Ge/sub 3/O/sub 12/

Journal Article Tucker, A; Birnbaum, M - J. Appl. Phys.; (United States)

Fluorescence studies of Nd : CaY/sub 2/Ge/sub 3/O/sub 12/ at 77 and 300 /sup 0/K has resulted in new level identifications for several transitions. In particular, the dominant laser transition (lower threshold) corresponds to an R/sub 2/..-->..Y/sub 3/ transition (1058 nm). Laser action has also been observed at 1065 nm (R/sub 1/..-->..Y/sub 2/) over the temperature range 77--300 /sup 0/K.
https://doi.org/10.1063/1.326217

Similar Records