We provide the material synthesis method, crystal structure information, and characterization of a novel mixed-valent metal oxide KIn_0.33^IIITe_0.67^VITe₂^IVO₇, closely related to zirconolite (CaZrTi₂O₇), a radioactive waste immobilized material, having a 3D framework. The reported metal oxide containing an alkali-metal cation (K⁺), main-group cation (In³⁺), tellurate, and tellurite has been synthesized as both single crystals and a pure polycrystalline phase through a hydrothermal synthesis method. Single-crystal X-ray diffraction indicates that KIn_0.33Te_2.67O₇ crystallizing in the orthorhombic space group Cmcm (No. 63) reveals a 3D framework structure with a 1D channel consisting of Te/InO₆ octahedra and TeO₄ polyhedra. An interesting transition reaction from KIn_0.33Te_2.67O₇ to KIn(TeO₃)₂ under hydrothermal conditions at 230 °C is discussed.

中文翻译：

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KIn0.33IIITe0.67VITe2IVO7：具有 3D 框架的类锆石混合价金属氧化物

我们提供了一种新型混合价金属氧化物 KIn _0.33 ^III Te _0.67 ^VI Te ₂ ^IV O ₇的材料合成方法、晶体结构信息和表征，该氧化物与锆石 (CaZrTi ₂ O ₇ )密切相关，锆石是一种放射性废物固定化材料，有一个 3D 框架。报道的含有碱金属阳离子 (K ⁺ )、主族阳离子 (In ³⁺ )、碲酸盐和亚碲酸盐的金属氧化物已通过水热合成方法合成为单晶和纯多晶相。单晶 X 射线衍射表明 KIn _0.33 Te在正交空间群Cmcm (No. 63) 中结晶的_2.67 O ₇揭示了具有由 Te/InO ₆八面体和 TeO ₄多面体组成的一维通道的 3D 框架结构。讨论了在 230 °C 的水热条件下从 KIn _0.33 Te _2.67 O ₇到 KIn(TeO ₃ ) ₂的有趣转变反应。