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

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)6992-6996
Number of pages5
JournalInorganic chemistry
Issue number17
StatePublished - Aug 20 2007

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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