The synthesis and structural characterization of Na[sub 3]WO[sub 3]N

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1994.1011· OSTI ID:7274284

Elder, S H ^[1]; DiSalvo, F J ^[2]; Parise, J B ^[3]; Hriljac, J A ^[4]; Richardson, Jr, J W ^[5]

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1. Cornell Univ., Ithaca, NY (United States) Institut des MJateriaux de Nantes, Nantes (France)
2. Cornell Univ., Ithaca, NY (United States)
3. State Univ. of New York at Stony Brook, Stony Brook, NY (United States)
4. Brookhaven National Lab., Upton, NY (United States)
5. Argonne National Lab., IL (United States)

The authors report the discovery of a new ternary oxynitride, Na[sub 3]WO[sub 3]N. Na[sub 3]WO[sub 3]N is synthesized by exposing a eutectic melt consisting of 1/2Na[sub 2]O:1Na[sub 2]WO[sub 4] to a flow of ammonia gas at 695[degrees]C. The compound crystallizes in the acentric space group Pmn2[sub 1] with a = 7.2481(3) [angstrom], b = 6.2728(3) [angstrom], and c = 56493(2) [angstrom]. 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 Li[sub 3]PO[sub 4] 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 [open quotes]salt-like[close quotes] consisting of isolated (WO[sub 3]N)[sup [minus]3] tetrahedral polyanions separated by Na[sup +].

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7274284
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 108:1; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
BREMSSTRAHLUNG
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELECTROMAGNETIC RADIATION
LATTICE PARAMETERS
NEUTRON DIFFRACTION
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
RADIATIONS
REFRACTORY METAL COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SYNCHROTRON RADIATION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN NITRIDES
TUNGSTEN OXIDES
X-RAY DIFFRACTION