X-ray diffraction study of molybdenum diselenide to 35.9 GPa

Resul Aksoy, Emre Selvi, Yanzhang Ma

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In situ high-pressure angle dispersive synchrotron X-ray diffraction studies of molybdenum diselenide (MoSe2) were carried out in a diamond-anvil cell to 35.9 GPa. No evidence of a phase transformation was observed in the pressure range. By fitting the pressure-volume data to the third-order Birch-Murnaghan equation of state, the bulk modulus, K0T, was determined to be 45.7±0.3 GPa with its pressure derivative, K′0T, being 11.6±0.1. It was found that the c-axis decreased linearly with pressure at a slope of -0.1593 when pressures were lower than 10 GPa. It showed different linear decrease with the slope of a -0.0236 at pressures higher than 10 GPa.

Original languageEnglish
Pages (from-to)2138-2140
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Issue number9
StatePublished - Sep 2008


  • C. High pressure
  • C. X-ray diffraction
  • D. Equations-of-state


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