Abstract

Voronoi–Dirichlet (VD) polyhedra have been used to make a crystal-chemical analysis of compounds containing in their crystal structure coordination polyhedra AnSe_n (An = Th, U, Np, Pu, Am, or Cm). It was found that atoms An(II), An(III), An(IV), and An(V) occur in selenides. These atoms coordinate from 6 to 10 selenium atoms in the form of Se^2– or Se^–. It was shown that the VD polyhedra make it possible to determine the valence state of An atoms in structures of crystalline substances and reveal errors in the crystal-structural information. A dependence of the multiplicity of Se–Se bonds on their length in 0D, 1D, and 2D groups composed of only selenium atoms was determined.

中文翻译：

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晶体结构中的AnSe n（An = Th，U，Np，Pu，Am或Cm）配位多面体

摘要

Voronoi–Dirichlet（VD）多面体已用于对晶体结构中包含多面体AnSe _n（An = Th，U，Np，Pu，Am或Cm）配位的化合物进行晶体化学分析。发现在硒化物中存在原子An（II），An（III），An（IV）和An（V）。这些原子以Se ^2–或Se ^–的形式配位6至10个硒原子。结果表明，VD多面体可以确定晶体结构中An原子的价态，并揭示晶体结构信息中的错误。确定了仅由硒原子构成的0D，1D和2D基团中Se-Se键的多样性对它们长度的依赖性。