Crystal structure and phase transitions in the uranium perovskite, Ba2SrUO6

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dc.contributor.authorReynolds, EMen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorThorogood, GJen_AU
dc.contributor.authorGregg, DJen_AU
dc.contributor.authorKimpton, JAen_AU
dc.date.accessioned2015-10-20T00:35:57Zen_AU
dc.date.available2015-10-20T00:35:57Zen_AU
dc.date.issued2013-02-01en_AU
dc.date.statistics2015-10-19en_AU
dc.description.abstractThe structure of one of the oxides proposed to be present in the grey phase of irradiated mixed oxide fuel, the double perovskite Ba2SrUO6 has been investigated from room temperature to 1300 K using synchrotron X-ray powder diffraction methods. The divalent strontium and hexavalent uranium are found to be fully ordered in the double-perovskite arrangement of alternating octahedra sharing corner oxygen atoms. At room temperature Ba2SrUO6 adopts a monoclinic structure in space group P21/n. Heating to above 900 K induces a first order transition to a rhombohedral structure, and further heating to above 1200 K results in a continuous transition to a cubic structure. The sequence of structures is associated with the progressive loss of cooperative tilting of the corner sharing SrO6 and UO6 octahedra. © 2012, Elsevier B.V.en_AU
dc.identifier.citationReynolds, E., Kennedy, B. J., Thorogood, G. J., Gregg, D. J., & Kimpton, J. A. (2013). Crystal structure and phase transitions in the uranium perovskite, Ba2SrUO6. Journal of Nuclear Materials, 433(1-3), 37-40. doi:10.1016/j.jnucmat.2012.08.034en_AU
dc.identifier.govdoc6194en_AU
dc.identifier.issn0022-3115en_AU
dc.identifier.issue1-3en_AU
dc.identifier.journaltitleJournal of Nuclear Materialsen_AU
dc.identifier.pagination37-40en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jnucmat.2012.08.034en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6346en_AU
dc.identifier.volume433en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectOxidesen_AU
dc.subjectPerovskiteen_AU
dc.subjectSynchrotronsen_AU
dc.subjectStrontiumen_AU
dc.subjectUraniumen_AU
dc.subjectHeatingen_AU
dc.titleCrystal structure and phase transitions in the uranium perovskite, Ba2SrUO6en_AU
dc.typeJournal Articleen_AU
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