The synthesis and crystal structure of U7O2Se 12

Matthew D. Ward; James A. Ibers

doi:10.1002/zaac.201400144

The synthesis and crystal structure of U₇O₂Se ₁₂

Matthew D. Ward, James A. Ibers

Chemistry

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The new compound U₇O₂Se₁₂ was synthesized at 1173 K as a result of both unintentional and intentional oxygen contamination. The composition balances with formal charges of +4, -2, and -2 for U, O, and Se, respectively. U₇O₂Se₁₂ crystallizes with one formula unit in space group C¹ _3h-P6̄ of the hexagonal system in a cell of dimensions a = 11.3222(4) Å, c = 4.1362(1) Å. The structure of U₇O ₂Se₁₂ closely resembles that of the An₇Te ₁₂ (An = Th, U) compounds, but contains cavities, in which oxygen atoms are coordinated to three uranium atoms in a trigonal planar arrangement. It is not known if other members of the An₇Q₁₂ family (An = Th, U; Q = S, Se, Te) are actually An₇O₂Q₁₂ compounds.

Original language	English (US)
Pages (from-to)	1585-1588
Number of pages	4
Journal	Zeitschrift fur Anorganische und Allgemeine Chemie
Volume	640
Issue number	8-9
DOIs	https://doi.org/10.1002/zaac.201400144
State	Published - Jul 2014

Keywords

Crystal structure
Oxyselenide
Synthesis
Uranium

ASJC Scopus subject areas

Inorganic Chemistry

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abstract = "The new compound U7O2Se12 was synthesized at 1173 K as a result of both unintentional and intentional oxygen contamination. The composition balances with formal charges of +4, -2, and -2 for U, O, and Se, respectively. U7O2Se12 crystallizes with one formula unit in space group C1 3h-P{\=6} of the hexagonal system in a cell of dimensions a = 11.3222(4) {\AA}, c = 4.1362(1) {\AA}. The structure of U7O 2Se12 closely resembles that of the An7Te 12 (An = Th, U) compounds, but contains cavities, in which oxygen atoms are coordinated to three uranium atoms in a trigonal planar arrangement. It is not known if other members of the An7Q12 family (An = Th, U; Q = S, Se, Te) are actually An7O2Q12 compounds.",

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AB - The new compound U7O2Se12 was synthesized at 1173 K as a result of both unintentional and intentional oxygen contamination. The composition balances with formal charges of +4, -2, and -2 for U, O, and Se, respectively. U7O2Se12 crystallizes with one formula unit in space group C1 3h-P6̄ of the hexagonal system in a cell of dimensions a = 11.3222(4) Å, c = 4.1362(1) Å. The structure of U7O 2Se12 closely resembles that of the An7Te 12 (An = Th, U) compounds, but contains cavities, in which oxygen atoms are coordinated to three uranium atoms in a trigonal planar arrangement. It is not known if other members of the An7Q12 family (An = Th, U; Q = S, Se, Te) are actually An7O2Q12 compounds.

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