Colorless single crystals of Sr[ReO₄]₂ were obtained from halide melts at 1123 K in open corundum crucibles. X‐ray diffraction revealed that Sr[ReO₄]₂ crystallizes in the monoclinic space group P2₁/n with the lattice parameters a = 627.31(4) pm, b = 1004.56(7) pm, c = 1271.25(9) pm and β = 97.118(3)° for Z = 4. The crystal structure contains a unique Sr²⁺‐cation site surrounded by eight crystallographically different oxygen atoms forming distorted bicapped trigonal prisms. All corners of these [SrO₈]^14– polyhedra (d(Sr–O) = 259–268 pm) are shared with tetrahedral meta‐perrhenate units [ReO₄]^– (d(Re–O) = 166–173 pm) formed from two crystallographically different Re⁷⁺ cations surrounded by four O^2– anions each, building up the three‐dimensional mosaic‐like structure of Sr[ReO₄]₂. Single‐crystal Raman data confirm the presence of two different kinds of symmetry‐free meta‐perrhenate units [ReO₄]^– and match well with results known from literature.

中文翻译：

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Sr [ReO4] 2：无水碱土金属间高hen酸盐的第一批单晶

Sr [ReO ₄ ] _2的无色单晶是从开放的刚玉坩埚中的1123 K卤化物熔体中获得的。X射线衍射显示Sr [ReO ₄ ] ₂在单斜空间群P 2 ₁ / n中结晶，晶格参数为a = 627.31（4）pm，b = 1004.56（7）pm，c = 1271.25（9）pm Z = 4时，β = 97.118（3）° 。晶体结构包含一个独特的Sr ²⁺阳离子位点，该位点被八个晶体学上不同的氧原子包围，形成扭曲的三棱柱形三棱柱。这些[SrO₈ ] ^14–多面体（d（Sr–O）= 259–268 pm）与由两个晶体学不同的ate形成的四面体间高per酸盐单元[ReO ₄ ] ^–（d（Re–O）= 166–173 pm）共享⁷⁺阳离子分别被四个O ^2–阴离子包围，从而建立了Sr [ReO ₄ ] ₂的三维马赛克状结构。单晶拉曼数据证实了两种不同类型的无对称高meta酸盐单元[ReO ₄ ]的存在^，并且与文献已知的结果非常吻合。