AnSen (An = Th, U, Np, Pu, Am, or Cm) Coordination Polyhedra in Crystal Structures

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...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2020-04, Vol.62 (4), p.454-464
Main Authors: Serezhkin, V. N., Albakajaji, M., Pushkin, D. V., Serezhkina, L. B.
Format: Article
Language:English
Subjects:
Atomic structure
Chemical analysis
Chemical compounds
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Coordination
Crystal structure
Crystals
Dirichlet problem
Neptunium
Nuclear Chemistry
Plutonium
Polyhedra
Selenides
Selenium
Valence
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Summary: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.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362220040025