Crystal structure determination of the oxynitride Sr[sub 2]TaO[sub 3]N
- Univ. de Rennes 1 (France). Lab. Verres et Ceramiques
- CNRS, Meudon (France). Lab. de Physicochimie des Materiaux
- Centre de Recherches d'Aubervilliers (France)
- Rutherford Appleton Lab., Didcot (United Kingdom). ISIS Science Div.
The crystal structure of the strontium tantalum oxynitride Sr[sub 2]TaO[sub 3]N has been resolved by Rietveld refinement using time-of-flight neutron powder diffraction data. The structure is of the K[sub 2]NiF[sub 4] type with a partially ordered anion sublattice (tetragonal, I4/mmm, a = 4.04127(3) [angstrom], c = 12.6073(2) [angstrom], c/a = 3.120, Z = 2). The tantalum atoms are at the center of TaO[sub 2](O, N)[sub 4] octahedra built up from two oxygen atoms at the apexes and four (N + O) atoms statistically forming the median plane. The strontium atoms have a coordination number of nine: SrO[sub 5](O, N)[sub 4]. The profile agreement factors are R[sub p] = 0.022, R[sub wp] = 0.016, R[sub exp] = 0.012, and R[sub 1] = 0.063.
- OSTI ID:
- 6068631
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 146:2; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL MODELS
CRYSTAL STRUCTURE
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
MATHEMATICAL MODELS
NEUTRON DIFFRACTION
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TANTALUM COMPOUNDS
TANTALUM NITRIDES
TANTALUM OXIDES
TRANSITION ELEMENT COMPOUNDS