Abstract

Voronoi–Dirichlet polyhedra (VPD) were used to perform a crystal-chemical analysis of 216 sulfides containing in their crystal structures 296 coordination polyhedra AnS_n (An = Th, U, Np, Pu, Am, Cm or Cf). It was found that, in sulfides, there occur An(II), An(III), An(IV), U(V), and U(VI) atoms that bind 6 to 10 sulfur atoms existing as S^2– or S^– ions. The most important parameters of the VD polyhedra were characterized, dependence was revealed of how the multiplicity of the S^––S^– bond depends on its length. It was shown that, in contrast to the procedure based on an analysis of the lengths of the An–S bonds, makes it possible to reliably determine the valence state of An atoms in the sulfide structures.

中文翻译：

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

摘要

Voronoi–Dirichlet多面体（VPD）用于对216种硫化物的晶体化学分析，这些硫化物在其晶体结构中包含296种配位多面体AnS _n（An = Th，U，Np，Pu，Am，Cm或Cf）。已发现，在硫化物中，会出现An（II），An（III），An（IV），U（V）和U（VI）原子，它们结合6至10个以S ^2–或S存在的硫原子^–离子。表征了VD多面体的最重要参数，揭示了S ^– –S ^–键的多样性如何取决于其长度。结果表明，与基于An–S键长度分析的方法相比，可以可靠地确定硫化物结构中An原子的价态。