The structure of BaSr{sub 4}U{sub 3}O{sub 14} and a structural and thermodynamic characterization of Sr{sub 5}U{sub 3}O{sub 14}
- Netherlands Energy Research Foundation ECN, Petten (Netherlands)
- Leiden Univ. (Netherlands). Inst. of Chemistry
The structures of Sr{sub 5}U{sub 3}O{sub 14} and BaSr{sub 4}U{sub 3}O{sub 14} have been studied by X-ray powder diffraction and neutron powder diffraction. Both compounds could be indexed on a pseudo-tetragonal, chiolite-type structure. Sr{sub 5}U{sub 3}O{sub 14} was shown to be orthorhombic and to have space group Pbca with a = 11.2416(7) {angstrom}, b = 11.2572(7) {angstrom}, c = 11.0791(4) {angstrom}, and Z = 4. BaSr{sub 4}U{sub 3}O{sub 14} was shown to be orthorhombic and to have space group Cmca with a = 11.3647(7) {angstrom}, b = 11.3770(7) {angstrom}, c = 11.0203(5) {angstrom}, and Z = 4. The thermodynamic properties of Sr{sub 5}U{sub 3}O{sub 14} at 298.15 K have been determined, and its thermal stability with respect to the neighboring strontium uranate phases are discussed.
- OSTI ID:
- 679261
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 146; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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