The Synthesis and Structural Characterization of Na3WO3N

Abstract

We report the discovery off a new ternary oxynitride, Na3WO3N. Na3WO3N is synthesized by exposing a eutectic melt consisting of 1/2Na2O: 1Na2WO4 to a flow of ammonia gas at 695 deg C. The compound crystallizes in the acentric space-group Pmn2(1) with a = 7.2481 (3), b = 6.2728 (3) and c = 5.6493 (2) A. The structure was determined from synchrotron X-ray powder diffraction data and refined using the Rietveld analysis on neutron powder diffraction data. It is isostructural to the low temperature form of Li3PO4, which can be derived from an ordered wurtzite structure-type with all the atoms having tetrahedral coordination. Alternatively, the structure can be described as being 'salt-like' consisting of isolated (WO3N)(-3) tetrahedral poly-anions separated by Na(+). Solid state nitride, Neutron diffraction, Oxynitrides, X ray diffraction.

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Document Details

Document Type
Technical Report
Publication Date
Jan 17, 1994
Accession Number
ADA275243

Entities

People

  • F. J. Disalvo
  • J. A. Hriljac
  • J. B. Parise
  • J. W. Richardson Jr.
  • S. H. Elder

Organizations

  • Cornell University Department of Chemistry and Chemical Biology

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Compounds
  • Chemistry
  • Crystal Lattices
  • Diffraction
  • Hydroxides
  • Intensity
  • Low Angles
  • Low Temperature
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • Neutron Diffraction
  • New York
  • Radiation
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Organic Chemistry
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Space