Synthesis, structure, and magnetic and electronic properties of Cs2Hg2USe5

Daniel E. Bugaris, Daniel M. Wells, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The compound Cs2Hg2USe5 was obtained from the solid-state reaction of U, HgSe, Cs2Se3, Se, and CsI at 1123 K. This material crystallizes in a new structure type in space group P2/n of the monoclinic system with a cell of dimensions a=10.276(6) Å, b=4.299(2) Å, c=15.432(9) Å, β=101.857(6) Å, and V=667.2(6) Å3. The structure contains 2 [Hg2 USe5] layers separated by Cs atoms. Within the layers are distorted HgSe4 tetrahedra and regular USe6 octahedra. In the temperature range of 25-300 K Cs2Hg2USe5 displays Curie-Weiss paramagnetism with μeff=3.71(2) μB. The compound exhibits semiconducting behavior in the [010] direction; the conductivity at 298 K is 3×10-3 S/cm. Formal oxidation states of Cs/Hg/U/Se may be assigned as +1/+2/+4/- 2, respectively.

Original languageEnglish (US)
Pages (from-to)1017-1020
Number of pages4
JournalJournal of Solid State Chemistry
Volume182
Issue number5
DOIs
StatePublished - May 1 2009

Keywords

  • Crystal structure
  • Electrical conductivity
  • Magnetism
  • Synthesis
  • Uranium mercury chalcogenide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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