Thermoelectric and structural properties of a new Chevrel phase: Ti0.3Mo5RuSe8

Michael A. McGuire, Anneliese M. Schmidt, Franck Gascoin, G. Jeffrey Snyder, Francis J. DiSalvo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The new Chevrel phase Ti0.3Mo5RuSe8 has been synthesized and characterized by quantitative microprobe analysis, powder X-ray diffraction, and high-temperature thermoelectric properties measurements. The thermoelectric properties of this compound are compared to the previously reported data for other related Chevrel phases. We report also the results of Rietveld analysis of powder X-ray diffraction data for Ti0.3Mo5RuSe8. This compound adopts the rhombohedral Chevrel phase structure (space group R over(3, -), Z=3) with hexagonal lattice constants a=9.75430(25) Å and c=10.79064(40) Å. The low level of incorporation and low scattering power of Ti precluded the identification of the Ti positions, and Rietveld refinement was carried out only for the Mo5RuSe8 framework of Ti0.3Mo5RuSe8 (Rp=10.5%, Rwp=14.6%). Rietveld analysis was also used to refine the structure of the unfilled phase Mo5RuSe8 (R over(3, -), Z=3, a=9.63994(8) Å, c=10.97191(11) Å, Rp=8.0%, Rwp=10.5%). Comparisons between the two structures are made.

Original languageEnglish (US)
Pages (from-to)2158-2163
Number of pages6
JournalJournal of Solid State Chemistry
Volume179
Issue number7
DOIs
StatePublished - Jul 2006

Keywords

  • Chevrel phase
  • Electrical resistivity
  • Molybdenum ruthenium selenide
  • Powder X-ray diffraction
  • Rietveld refinement
  • Seebeck coefficient
  • Thermoelectric
  • Titanium molybdenum ruthenium selenide

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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