Pyrochlore to fluorite transitions - ordering in fluorites?

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dc.contributor.authorWhittle, KRen_AU
dc.contributor.authorCranswick, LMDen_AU
dc.contributor.authorRedfern, SATen_AU
dc.contributor.authorSwainson, IPen_AU
dc.contributor.authorLumpkin, GRen_AU
dc.date.accessioned2010-08-10T04:36:24Zen_AU
dc.date.available2010-08-10T04:36:24Zen_AU
dc.date.issued2008-12-01en_AU
dc.date.statistics2008-12-01en_AU
dc.description.abstractTwo systems have been studied La2-xYxZr2O7 and La2-xYxHf2O7, as part of an on-going study of radiation tolerance in nuclear waste forms and related oxide materials. The structural effects of increasing Y content in La based zirconate and hafnate pyrochlores have been studied with neutron diffraction and electron microscopy. Results have shown a difference in structural stability for both the pyrochlore and fluorite phases within each system, including the presence of two-phase regions in both systems. In the zirconate, the two-phase region lies in the range x = 0.9-1.6. This is shifted to higher Y content in the hafnate system and lies in the range of x = 1.5 to approximately 1.8-1.9. In addition to the differences in phase stability, electron diffraction, predominantly down the [110] zone axis, has shown evidence for ordering in the form of structured diffuse scattering within the fluorite phases.en_AU
dc.identifier.articlenumber301en_AU
dc.identifier.booktitleMRS Proceedings: Structure/Property Relationships in Fluorite-Derivative Compoundsen_AU
dc.identifier.citationWhittle, K. R., Cranswick, L. M., Redfern, S. A. T., Swainson, I. P., & Lumpkin, G. R. (2008). Pyrochlore to fluorite transitions - ordering in fluorites? Paper presented to the 2008 MRS Fall Meeting, 1st – 5th December 2008. Boston, Massachusetts, United States of America: Hynes Convention Center. In K. E. Sickafus, A. Navrotsky, S. R. Phillpot (Eds.), MRS Proceedings: Structure/Property Relationships in Fluorite-Derivative Compounds, 1122, 66-71. doi:10.1557/PROC-1122-O03-01en_AU
dc.identifier.conferenceenddate5 December 2008en_AU
dc.identifier.conferencename2008 MRS Fall Meetingen_AU
dc.identifier.conferenceplaceBoston, Massachusettsen_AU
dc.identifier.conferencestartdate1 December 2008en_AU
dc.identifier.editorsK. E. Sickafus, A. Navrotsky, S. R. Phillpoten_AU
dc.identifier.govdoc2282en_AU
dc.identifier.issn0272-9172en_AU
dc.identifier.urihttp://dx.doi.org/10.1557/PROC-1122-O03-01en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2147en_AU
dc.identifier.volume1122en_AU
dc.language.isoenen_AU
dc.publisherMaterials Research Societyen_AU
dc.subjectPyrochloreen_AU
dc.subjectFluoriteen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectElectron microscopyen_AU
dc.subjectDiffuse scatteringen_AU
dc.subjectHafnatesen_AU
dc.titlePyrochlore to fluorite transitions - ordering in fluorites?en_AU
dc.typeConference Paperen_AU
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