Accession Number:

ADA275243

Title:

The Synthesis and Structural Characterization of Na3WO3N

Descriptive Note:

Technical rept. 1990-1993

Corporate Author:

CORNELL UNIV ITHACA NY DEPT OF CHEMISTRY

Report Date:

1994-01-17

Pagination or Media Count:

25.0

Abstract:

We report the discovery off a new ternary oxynitride, Na3WO3N. Na3WO3N is synthesized by exposing a eutectic melt consisting of 12Na2O 1Na2WO4 to a flow of ammonia gas at 695 deg C. The compound crystallizes in the acentric space-group Pmn21 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.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Crystallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE