Single crystals of CsGa₇O₁₁, RbGa₇O₁₁, and RbGa₄In₅O₁₄ were grown from alkali halide melts and their structures were characterized by single crystal and powder X‐ray diffraction. CsGa₇O₁₁ and RbGa₇O₁₁ adopt the same structure type, reminiscent of the hollandite structure type, as it contains nearly rectangular channels made up of two dimers of edge‐sharing GaO₆ octahedra, and two corner‐sharing octahedron/tetrahedron pairs. The structure of RbGa₄In₅O₁₄ is more complex and is comprised of indium octahedra, gallium trigonal bipyramids, and gallium tetrahedra, and contains similar sized tunnels as CsGa₇O₁₁ and RbGa₇O₁₁. CsGa₇O₁₁ and RbGa₄In₅O₁₄ were further characterized by TGA, ion exchange experiments, and DFT studies revealing that both structures are thermodynamically stable up to 850°C; however, CsGa₇O₁₁ decomposes to GaO(OH) xH₂O when heated in warm aqueous solutions. CsGa₇O₁₁ undergoes ion exchange in both an aqueous solution of RbCl and a RbNO₃ melt, as predicted by DFT studies, where the ion exchange is more extensive in the RbNO₃ melt.

中文翻译：

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碱性没食子酸盐的结构和稳定性在结构上让人联想到钙铁矿

CsGa ₇ O ₁₁，RbGa ₇ O ₁₁和RbGa ₄ In ₅ O _14的单晶由碱金属卤化物熔体生长而成，其结构通过单晶和粉末X射线衍射进行表征。CsGa ₇ O ₁₁和RbGa ₇ O ₁₁采用相同的结构类型，让人想起了钙铁矿结构类型，因为它包含由两个边缘共享的GaO ₆八面体和两个角共享的八面体/四面体对组成的几乎矩形通道。。RbGa ₄ In ₅ O _14的结构该化合物更复杂，由八面体铟，三角双锥体镓和四面体镓组成，并包含与CsGa ₇ O ₁₁和RbGa ₇ O ₁₁相似大小的隧道。通过TGA，离子交换实验和DFT研究进一步表征了CsGa ₇ O ₁₁和RbGa ₄ In ₅ O ₁₄，这两种结构在高达850°C的温度下都具有热力学稳定性。然而，CsGa ₇ ö ₁₁分解为高（OH）1 H ₂时在温暖的水溶液加热O操作。砷化镓₇ O ₁₁在氯化铷的两个水溶液和RbNO经历离子交换₃熔化，通过DFT研究，其中所述离子交换是在RbNO更广泛的如预测的₃熔体。