Synthesis and characterization of new quaternary selenides with ThCr2Si2-type structure: ACuMnSe2 (A = K, Rb, Cs)

M. Oledzka, K. V. Ramanujachary, M. Greenblatt

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Abstract

The new selenides ACuMnSe2 (A = K, Rb, Cs) were synthesized by heating a mixture of the corresponding alkali metal carbonate, copper oxide, manganese, and elemental selenium at 1200 K in hydrogen/argon atmosphere. The dark-gray compounds, moderately air-stable, crystallize in the ThCr2Si2-type structure (space group I4/mmm). Semiconducting properties and short-range antiferromagnetism were observed for all the samples. A comparison of the transport properties with those previously reported for the isostructural sulfides ACuMnS2 (A = K, Rb, Cs) confirmed the primary role of the metalmetal bonds in defining the electronic properties of this series.

Original languageEnglish (US)
Pages (from-to)855-866
Number of pages12
JournalMaterials Research Bulletin
Volume33
Issue number6
DOIs
Publication statusPublished - Jan 1 1998

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • A. chalcogenides
  • C. X-ray diffraction
  • D. transport properties

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