Synthesis, structure, and electrical resistivity of Cs 3U 18Se 38

George N. Oh, James A Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Cs 3U 18Se 38 was synthesized by the solid-state reactions of U, Se, CsCl or Cs 2Se 3, and P or As at 1273 K. This compound crystallizes in a new structure in the tetragonal space group D 18 4h-I4/mcm. The asymmetric unit contains U atoms in four different coordination environments. The overall three-dimensional network structure contains channels along the c axis, in which the Cs atoms lie. The formula Cs 3U 18Se 38 does not charge balance with the typical formal oxidation states of the elements. Electrical resistivity measurements conducted on a single crystal reveal a broad feature at 225 K, atypical semiconductor behavior below 57 K, and a calculated band gap of 0.0030(1) eV.

Original languageEnglish (US)
Pages (from-to)81-86
Number of pages6
JournalJournal of Solid State Chemistry
Volume192
DOIs
StatePublished - Aug 1 2012

Keywords

  • Cesium uranium selenide
  • Charge balance
  • Single-crystal X-ray structure
  • Single-crystal electrical resistivity

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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