Determination of the crystal structure of δ-MoN by neutron diffraction

Craig L. Bull, Paul F. McMillan, Emmanuel Soignard, Kurt Leinenweber

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


We have determined the crystal structure of ordered hexagonal δ-MoN by use of powder X-ray diffraction and time-of-flight neutron diffraction. A disordered variety of the compound was first prepared by high-temperature ammonolysis of MoCl5. This material has hexagonal symmetry with the space group P63mc with a=2.87(2) and c=2.81(1)Å. Upon high pressure annealing, the N-atoms become ordered and the unit cell doubles in size: a=5.73659(10) and c=5.61884(17)Å. The superconducting transition temperature increases from 4K in the disordered compound to 12.1K in the ordered phase.

Original languageEnglish (US)
Pages (from-to)1488-1492
Number of pages5
JournalJournal of Solid State Chemistry
Issue number4-5
StatePublished - Apr 1 2004


  • Hardness
  • High pressure
  • MoN
  • Neutron diffraction
  • Structure determination

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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