Silicogermanate Ba2K2In2[(Si0.8Ge0.2)6O18] · 2H2O As an Analogue of the Natural Zirconosilicate Kostylevite K4Zr2[Si6O18] · 2H2O

Crystals of new silicogermanate Ba 2 K 2 In 2 [(Si 0.8 Ge 0.2 ) 6 O 18 ] · 2H 2 O were prepared by the hydrothermal synthesis; sp. gr. P 2 1 / n , a = 6.5548(6) Å, b = 11.6946(10) Å, c = 13.0203(11) Å, β = 102.774(1)°. This compound is structurally similar to the natural zirconosilicate kostylevite...

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Bibliographic Details
Published in:Crystallography reports 2020-09, Vol.65 (5), p.711-715
Main Authors: Reutova, O. V., Belokoneva, E. L., Dimitrova, O. V., Volkov, A. S.
Format: Article
Language:English
Subjects:
Crystallography and Scattering Methods
Germanium
Hydrothermal crystal growth
Physics
Physics and Astronomy
Silicon
Structure of Inorganic Compounds
Tetrahedra
Zirconium
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Summary:Crystals of new silicogermanate Ba 2 K 2 In 2 [(Si 0.8 Ge 0.2 ) 6 O 18 ] · 2H 2 O were prepared by the hydrothermal synthesis; sp. gr. P 2 1 / n , a = 6.5548(6) Å, b = 11.6946(10) Å, c = 13.0203(11) Å, β = 102.774(1)°. This compound is structurally similar to the natural zirconosilicate kostylevite K 4 Zr 2 [Si 6 O 18 ] · 2H 2 O (sp. gr. P 2 1 / c ), in which Zr atoms are replaced by In atoms, K atoms are partially replaced by Ba atoms, and Ge atoms are isomorphously incorporated into SiO 4 tetrahedra. The six-membered tetrahedral rings composed of (Si,Ge)O 4 tetrahedra are linked by InO 6 octahedra to form a mixed framework, with large cations located in the cavities. The difference in the space group designation is only in the choice of the coordinate axes and, correspondingly, in the setting of the same monoclinic space group.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774520050193