A U(V) chalcogenide: Synthesis, structure, and characterization of K 2Cu3US5

Danielle L. Gray; Lisa A. Backus; Hans Albrecht Krug Von Nidda; S. Skanthakumar; Alois Loidl; L. Soderholm; James A. Ibers

doi:10.1021/ic700774g

A U(V) chalcogenide: Synthesis, structure, and characterization of K ₂Cu₃US₅

Danielle L. Gray, Lisa A. Backus, Hans Albrecht Krug Von Nidda, S. Skanthakumar, Alois Loidl, L. Soderholm, James A. Ibers^*

^*Corresponding author for this work

Chemistry

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Abstract

The compound K₂Cu₃US₅ was obtained by the reaction of K₂S, UCl₄, CuCl, and S at 973 K. K ₂Cu₃US₅ crystallizes in a new structure type in space group Cmcm of the orthorhombic system in a cell of dimensions a = 3.9374(6) Å, b = 13.813(2) Å, c = 17.500(3) Å, and V = 951.8(2) Å³ at 153 K. The structure comprises _∞²[UCu₃S₅^2-] slabs separated by K⁺ cations. The slabs are built from CuS₄ tetrahedra and US₆ octahedra. Their connectivity differs from other known octahedral/tetrahedral packing patterns. In the temperature range 130-300 K the compound exhibits Curie-Weiss magnetic behavior with μ_eff = 2.45(8) μ_B. This result together with both the bond distances and bond valence calculations and the absence of a Cu²⁺ ESR signal support the formulation of the above compound as K⁺ ₂Cu⁺₃U⁵⁺S^2-₅.

Original language	English (US)
Pages (from-to)	6992-6996
Number of pages	5
Journal	Inorganic chemistry
Volume	46
Issue number	17
DOIs	https://doi.org/10.1021/ic700774g
State	Published - Aug 20 2007

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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@article{e4ffea90621b4d31b89b97dfee0d693b,

title = "A U(V) chalcogenide: Synthesis, structure, and characterization of K 2Cu3US5",

abstract = "The compound K2Cu3US5 was obtained by the reaction of K2S, UCl4, CuCl, and S at 973 K. K 2Cu3US5 crystallizes in a new structure type in space group Cmcm of the orthorhombic system in a cell of dimensions a = 3.9374(6) {\AA}, b = 13.813(2) {\AA}, c = 17.500(3) {\AA}, and V = 951.8(2) {\AA}3 at 153 K. The structure comprises ∞2[UCu3S52-] slabs separated by K+ cations. The slabs are built from CuS4 tetrahedra and US6 octahedra. Their connectivity differs from other known octahedral/tetrahedral packing patterns. In the temperature range 130-300 K the compound exhibits Curie-Weiss magnetic behavior with μeff = 2.45(8) μB. This result together with both the bond distances and bond valence calculations and the absence of a Cu2+ ESR signal support the formulation of the above compound as K+ 2Cu+3U5+S2-5.",

author = "Gray, {Danielle L.} and Backus, {Lisa A.} and {Von Nidda}, {Hans Albrecht Krug} and S. Skanthakumar and Alois Loidl and L. Soderholm and Ibers, {James A.}",

year = "2007",

month = aug,

day = "20",

doi = "10.1021/ic700774g",

language = "English (US)",

volume = "46",

pages = "6992--6996",

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T1 - A U(V) chalcogenide

T2 - Synthesis, structure, and characterization of K 2Cu3US5

AU - Gray, Danielle L.

AU - Backus, Lisa A.

AU - Von Nidda, Hans Albrecht Krug

AU - Skanthakumar, S.

AU - Loidl, Alois

AU - Soderholm, L.

AU - Ibers, James A.

PY - 2007/8/20

Y1 - 2007/8/20

N2 - The compound K2Cu3US5 was obtained by the reaction of K2S, UCl4, CuCl, and S at 973 K. K 2Cu3US5 crystallizes in a new structure type in space group Cmcm of the orthorhombic system in a cell of dimensions a = 3.9374(6) Å, b = 13.813(2) Å, c = 17.500(3) Å, and V = 951.8(2) Å3 at 153 K. The structure comprises ∞2[UCu3S52-] slabs separated by K+ cations. The slabs are built from CuS4 tetrahedra and US6 octahedra. Their connectivity differs from other known octahedral/tetrahedral packing patterns. In the temperature range 130-300 K the compound exhibits Curie-Weiss magnetic behavior with μeff = 2.45(8) μB. This result together with both the bond distances and bond valence calculations and the absence of a Cu2+ ESR signal support the formulation of the above compound as K+ 2Cu+3U5+S2-5.

AB - The compound K2Cu3US5 was obtained by the reaction of K2S, UCl4, CuCl, and S at 973 K. K 2Cu3US5 crystallizes in a new structure type in space group Cmcm of the orthorhombic system in a cell of dimensions a = 3.9374(6) Å, b = 13.813(2) Å, c = 17.500(3) Å, and V = 951.8(2) Å3 at 153 K. The structure comprises ∞2[UCu3S52-] slabs separated by K+ cations. The slabs are built from CuS4 tetrahedra and US6 octahedra. Their connectivity differs from other known octahedral/tetrahedral packing patterns. In the temperature range 130-300 K the compound exhibits Curie-Weiss magnetic behavior with μeff = 2.45(8) μB. This result together with both the bond distances and bond valence calculations and the absence of a Cu2+ ESR signal support the formulation of the above compound as K+ 2Cu+3U5+S2-5.

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A U(V) chalcogenide: Synthesis, structure, and characterization of K ₂Cu₃US₅

Abstract

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