The fluorite-pyrochlore transformation of Ho2-yNdyZr2O7

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dc.contributor.authorClements, Ren_AU
dc.contributor.authorHester, JRen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorLing, CDen_AU
dc.contributor.authorStampfl, APJen_AU
dc.date.accessioned2011-11-23T04:07:36Zen_AU
dc.date.available2011-11-23T04:07:36Zen_AU
dc.date.issued2011-08-01en_AU
dc.date.statistics2011-09-23en_AU
dc.description.abstractTwelve members of the Ho2-yNdyZr2O7 series, prepared using conventional solid state methods, have been characterised by neutron powder diffraction. Ho2Zr2O7 has a defect fluorite structure whereas Nd2Zr2O7 is found to adopt the ordered pyrochlore structure with the composition induced fluorite-pyrochlore transformation occurring near y=1. Rietveld analysis on the neutron data for all the compositions reveals an increase in lattice parameter as a function of y across the entire series, with a small discontinuity associated with the transformation. The neutron profile results suggest that domains of pyrochlore-type initially begin to form before crystallising into a separate phase, and therefore that anion and cation ordering processes are distinct. There is a strong correlation between the extent of disorder in the anion sublattice and the x-parameter of 48f oxygen. These results point the way to a better understanding of the stability observed in pyrochlore structures.(C) 2011 Elsevier Inc.en_AU
dc.identifier.citationClements, R., Hester, J.R., Kennedy, B.J., Ling, C.D., Stampfl, A.P.J. (2011), The fluorite-pyrochlore transformation of Ho2-yNdyZr2O7, Journal of Solid State Chemistry, 84(8), 2108-2113. doi:10.1016/j.jssc.2011.05.054en_AU
dc.identifier.govdoc3791en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination2108-2113en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jssc.2011.05.054en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3885en_AU
dc.identifier.volume84en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNeutron diffractionen_AU
dc.subjectFluoriteen_AU
dc.subjectTransformationsen_AU
dc.subjectDefectsen_AU
dc.subjectPyrochloreen_AU
dc.subjectSynchrotronsen_AU
dc.titleThe fluorite-pyrochlore transformation of Ho2-yNdyZr2O7en_AU
dc.typeJournal Articleen_AU
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