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 journalArticle

79 Citations (Scopus)

Abstract

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
Volume177
Issue number4-5
DOIs
StatePublished - Apr 1 2004

Fingerprint

ammonolysis
Neutron diffraction
X ray powder diffraction
Superconducting transition temperature
neutron diffraction
Crystal structure
transition temperature
Annealing
Atoms
crystal structure
annealing
symmetry
cells
diffraction
atoms
x rays
Temperature
molybdenum chloride

Keywords

  • 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

Cite this

Determination of the crystal structure of δ-MoN by neutron diffraction. / Bull, Craig L.; McMillan, Paul F.; Soignard, Emmanuel; Leinenweber, Kurt.

In: Journal of Solid State Chemistry, Vol. 177, No. 4-5, 01.04.2004, p. 1488-1492.

Research output: Contribution to journalArticle

Bull, Craig L. ; McMillan, Paul F. ; Soignard, Emmanuel ; Leinenweber, Kurt. / Determination of the crystal structure of δ-MoN by neutron diffraction. In: Journal of Solid State Chemistry. 2004 ; Vol. 177, No. 4-5. pp. 1488-1492.
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AB - 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.

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