Phase transition in the layered ternary copper sulfide [α BaCu4S3]

T. Ohtani, T. Hoshino, A. Tsujinouchi, M. Hasegawa, N. Nagaoka, Y. Yokota, Y. Okada

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The layered ternary copper sulfide a BaCu4S3 showed a peritectic-like decomposition at 816-911 K, in contrast to the earlier report. Electrical resistivity ρ{variant} and differential scanning calorimetry (DSC) measurements showed a phase transition at 188-205 K, which was associated with a sharp increase of ρ{variant} on cooling. The electron diffraction studies revealed that the transition was accompanied by the superlattice formation with a wave vector of q = (1/5)b*. The transition is possibly associated with a positional order-disordering or a charge-density-wave formation. It was proposed that the relatively high conductivity originates from atomic vacancies.

Original languageEnglish
Pages (from-to)161-167
Number of pages7
JournalMaterials Research Bulletin
Issue number2
Publication statusPublished - Feb 1995


  • Barium
  • Copper
  • Sulfides

ASJC Scopus subject areas

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


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