Abstract

Crystals of new silicogermanate Ba₂K₂In₂[(Si_0.8Ge_0.2)₆O₁₈] · 2H₂O were prepared by the hydrothermal synthesis; sp. gr. P2₁/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 K₄Zr₂[Si₆O₁₈] · 2H₂O (sp. gr. P2₁/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 SiO₄ tetrahedra. The six-membered tetrahedral rings composed of (Si,Ge)O₄ tetrahedra are linked by InO₆ 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.

中文翻译：

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硅锗锗酸盐Ba 2 K 2 In 2 [（Si 0.8 Ge 0.2）6 O 18]·2H 2 O类似于天然硅酸锆Kostylevite K 4 Zr 2 [Si 6 O 18]·2H 2 O

摘要

通过水热合成制备了新的硅锗锗酸盐Ba ₂ K ₂ In ₂ [（Si _0.8 Ge _0.2）₆ O ₁₈ ]·2H ₂ O的晶体。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）°。该化合物的结构类似于天然锆硅酸铝kostylevite K ₄ Zr ₂ [Si ₆ O ₁₈ ]·2H ₂ O（sp。P 2 ₁ / c），其中Zr原子被In原子取代，K原子被Ba原子部分取代，而Ge原子同构地掺入SiO ₄四面体中。由（Si，Ge）O ₄四面体组成的六元四面体环通过InO ₆八面体连接以形成混合骨架，其中大阳离子位于腔体内。空间组指定的区别仅在于坐标轴的选择，以及相应地同一单斜空间组的设置。