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Crystal chemistry and the role of ionic radius in rare earth tetrasilicates: Ba2RE2Si4O12F2 (RE = Er 3+–Lu3+) and Ba2RE2 Si4O13 (RE = La3+–Ho3+ )

Journal Article · · Acta Crystallographica. Section B, Structural Science, Crystal Engineering and Materials (Online)

Structural variations across a series of barium rare earth (RE) tetrasilicates are studied. Two different formulas are observed here, namely those of a new cyclo-silicate fluoride, BaRE2Si4O12F2(RE = Er3+–Lu3+) and new compounds in the Ba2RE2Si4O13(RE = La3+–Ho3+) family, covering the whole range of ionic radii for the rare earth ions. The Ba2RE2Si4O13series is further subdivided into two polymorphs, also showing a dependence on rare earth ionic radius (space group P{\overline 1} for La3+–Nd3+, and space groupC2/cfor Sm3+–Ho3+). Two of the structure types identified are based on dinuclear rare earth units that differ in their crystal chemistries, particularly with respect to the role of fluorine as a structural director. The broad study of rare earth ions provides greater insight into understanding structural variations within silicate frameworks and the nature off-block incorporation in oxyanion frameworks. The single crystals are grown from high-temperature (ca953 K) hydrothermal fluids, showing the versatility of the technique to access new phases containing recalcitrant rare earth oxides, enabling the study of structural trends.

Research Organization:
Clemson Univ., SC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)
Grant/Contract Number:
SC0014271
OSTI ID:
1596460
Journal Information:
Acta Crystallographica. Section B, Structural Science, Crystal Engineering and Materials (Online), Journal Name: Acta Crystallographica. Section B, Structural Science, Crystal Engineering and Materials (Online) Journal Issue: 5 Vol. 73; ISSN ACSBDA; ISSN 2052-5206
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

La2Si2O7 im I—Typ: Gemäß La6[Si4O13][SiO4]2kein echtes Lanthandisilicat journal March 2002
Ag10Si4O13?The First Tetrasilicate journal June 1979
Crystallographic and Spectroscopic Investigations on Nine Metal-Rare-Earth Silicates with the Apatite Structure Type: Nine Metal-Rare-Earth Silicates with the Apatite Structure Type journal January 2015
Ag18(SiO4)2(Si4O13), das erste Silbersilicat mit gemischten Anionen journal May 1991
Synthese und Kristallstruktur des Fluorid-ino-Oxosilicats Cs2YFSi4O10 journal June 2007
Ba 2 Ce 3 F[SiO 4 ] 3 : Ein ausgeordnetes Fluorid-Oxosilicat im Apatit -Typ journal September 2008
K5La4F[SiO4]4: A Fluoride-Poor Quinary Lanthanum Neso-Oxosilicate journal September 2010
Synthesis and Crystal Structure of the Fluoride-Rich Rubidium Scandium Fluoride Oxosilicate Rb3Sc2F5Si4O10 journal June 2011
Crystal Structure and Infrared Spectrum of the Cyclosilicate Ca2ZrSi4O12 journal January 1993
Excitation wavelength dependent luminescence properties for Eu3+-activated Ba2Gd2Si4O13 phosphor journal April 2015
Hydrothermal synthesis of new alkali silicates I. Potassium neodymium phases journal August 1993
Hydrothermal synthesis of new alkali silicates II. Sodium neodymium and sodium yttrium phases journal August 1993
The potassium niobyl cyclotetrasilicate K2(NbO)2Si4O12 journal May 1992
The composition, luminescence, and structure of Sr8[Si4O12]Cl8:Eu2+ journal September 2001
Structural analysis by Rietveld refinement of calcium and lanthanum phosphosilicate apatites journal September 2013
Synthesis and luminescence properties of Ba2Gd2Si4O13:Ce3+ phosphor for UV light-emitting diodes journal October 2016
Structural and photoluminescence properties of doped and REE-endmember mixed-framework rare-earth sorosilicates journal December 2015
The lanthanoid(III) chloride cyclo-tetrasilicates M6Cl10[Si4O12] (M=Sm, Gd–Dy): Synthesis, structure and IR investigations journal August 2006
Hydrothermal synthesis of new rare earth silicate fluorides: A novel class of polar materials journal November 2012
One-pot occurrence of two polymorphs of Rb 2 Sc[Si 4 O 10 ]F and their structural, spectroscopic and computational characterization journal December 2014
VUV spectroscopic properties of Ba2Gd2Si4O13:Re3+ (Re3+=Ce3+, Tb3+, Dy3+, Eu3+, Sm3+) journal May 2013
Apatite-type Pr9K(SiO4)6O2—a potential oxide ion conductor journal December 2005
Hydrothermal synthesis, structure, and property characterization of rare earth silicate compounds: NaBa3Ln3Si6O20 (Ln = Y, Nd, Sm, Eu, Gd) journal October 2015
Flux Crystal Growth and Optical Properties of Two Uranium-Containing Silicates: A 2 USiO 6 ( A = Cs, Rb) journal April 2015
Crystal Chemistry of Alkali Thorium Silicates Under Hydrothermal Conditions journal May 2015
Syntheses, Structure, and Characterization of Crystal La 6 Ba 4 (SiO 4 ) 6 F 2 , a Promising Laser Host journal March 2005
High Light Yield of Sr 8 (Si 4 O 12 )Cl 8 :Eu 2+ under X-ray Excitation and Its Temperature-Dependent Luminescence Characteristics journal June 2014
Inorganic Lanthanide Compounds with Complex Anions journal June 2002
High-pressure synthesis, crystal structures, and luminescence properties of europium(II) metasilicate and europium(II)-activated calcium and strontium metasilicates journal April 1982
Flux Synthesis, Crystal Structure, and Luminescence Properties of a New Europium Fluoride−Silicate:  K 5 Eu 2 FSi 4 O 13 journal April 2007
Hydrothermal Growth of Lanthanide Borosilicates: A Useful Approach to New Acentric Crystals Including a Derivative of Cappelenite journal November 2014
Flux Synthesis, Crystal Structures, and Luminescence Properties of Salt-Inclusion Lanthanide Silicates: [K 9 F 2 ][Ln 3 Si 12 O 32 ] (Ln = Sm, Eu, Gd) journal October 2008
A novel green-emitting phosphor Ba 2 Gd 2 Si 4 O 13 :Eu 2+ for near UV-pumped light-emitting diodes journal January 2015
Hydrothermal synthesis as a route to mineralogically-inspired structures journal January 2016
Four-membered silicate rings: Vibrational analysis of BaCuSi 2 O 6 and implications for glass structure journal August 1997
Ba 2 Gd 2 (Si 4 O 13 ): a silicate with finite Si 4 O 13 chains journal February 2010
Structure of the cyclic barium copper silicate Ba2Cu2[Si4O12] at 300 K journal January 1992
A short history of SHELX journal December 2007
X-ray diffraction study of K 3 NdSi 7 O 17 : a new framework silicate with a linear Si—O—Si bond journal October 2000
Structure of Na 3 YSi 6 O 15 – a unique silicate based on discrete Si 6 O 15 units, and a possible fast-ion conductor journal October 1995
Structure, phase transitions and ionic conductivity of K 3 NdSi 6 O 15 · x H 2 O. II. Structure of β-K 3 NdSi 6 O 15 journal June 2000
K 9 Y 3 [Si 12 O 32 ]F 2 journal January 2014
Rb 2 Lu[Si 4 O 10 ]F, a tubular chain silicate journal February 2014
The structural relation between the new synthetic silicate K2ScFSi4O10 and narsarsukite, Na2(Ti,Fe3+)(O,F)Si4O10 [The structural relation between the new synthetic silicate K2ScFSi4O10 and narsarsukite, Na2(Ti,Fe3+)(O,F)Si4O10] journal February 2004
Synthesis and structural study of five new trisilicates, BaREE2Si3O10 (REE = Gd, Er, Yb, Sc) and SrY2Si3O10, including a review on the geometry of the Si3O10 unit [Synthesis and structural study of five new trisilicates, BaREE2Si3O10 (REE = Gd, Er, Yb, Sc) and SrY2Si3O10, including a review on the geometry of the Si3O10 unit] journal April 2010
BaYb6(Si2O7)2(Si3O10) ? the first silicate containing both Si2O7 and Si3O10 groups: synthesis, crystal chemistry and topology [BaYb6(Si2O7)2(Si3O10) ? the first silicate containing both Si2O7 and Si3O10 groups: synthesis, crystal chemistry and topology] journal December 2013
Blue-white-green tunable luminescence from Ba_2Gd_2Si_4O_13:Ce^3+,Tb^3+ phosphors excited by ultraviolet light journal January 2010
Preparation, structural and luminescent properties of Ba_2Gd_2Si_4O_13:Eu^3+ for white LEDs journal January 2011
Comparison of the crystal chemistry of selected MSi 6 O 15 -based silicates journal December 1997
Structural complexity of lead silicates: Crystal structure of Pb21[Si7O22]2[Si4O13] and its comparison to hyttsjoite journal April 2014