Investigating the local structure of lanthanoid hafnates Ln2Hf2O7 via diffraction and spectroscopy

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dc.contributor.authorBlanchard, PERen_AU
dc.contributor.authorLiu, Sen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorLing, CDen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorAitken, JBen_AU
dc.contributor.authorCowie, BCCen_AU
dc.contributor.authorTadich, Aen_AU
dc.date.accessioned2013-03-15T03:20:16Zen_AU
dc.date.available2013-03-15T03:20:16Zen_AU
dc.date.issued2013-02-07en_AU
dc.date.statistics2013-03-15en_AU
dc.description.abstractThe lanthanoid hafnates Ln2Hf2O7 (Ln = La, Pr, Nd, Sm?Tm) were studied using a combination of synchrotron X-ray and neutron powder diffraction together with X-ray absorption and Raman spectroscopy. Spectroscopic methods revealed a gradual increase in disorder from the ideal pyrochlore structure to the defect fluorite structure as the size of the Ln cation increases. The line shape of the Hf L3-edge X-ray absorption near edge spectra which is sensitive to the local coordination environment changed with increasing disorder. The general line shape of the O K-edge XANES and Raman spectra also indicated an increase in disorder across the Ln2Hf2O7 series. Differences in the diffraction and spectroscopy analysis reflect the greater sensitivity of the spectroscopy techniques to local ordering. © 2013, American Chemical Societyen_AU
dc.identifier.citationBlanchard, P. E. R., Liu, S., Kennedy. B. J., Ling, C. D., Avdeev, M., Aitken, J. B., Cowie, B. C. C., & Tadich, A. (2013). Investigating the local structure of lanthanoid hafnates Ln2Hf2O7 via diffraction and spectroscopy. Journal of Physical Chemistry C, 117(5), 2266-2273. doi:10.1021/jp311329qen_AU
dc.identifier.govdoc4890en_AU
dc.identifier.issn1932-7447en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleJournal of Physical Chemistry Cen_AU
dc.identifier.pagination2266-2273en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/jp311329qen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4525en_AU
dc.identifier.volume117en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectRaman spectroscopyen_AU
dc.subjectPyrochloreen_AU
dc.subjectIonic conductivityen_AU
dc.subjectFluoriteen_AU
dc.subjectSolid solutionsen_AU
dc.titleInvestigating the local structure of lanthanoid hafnates Ln2Hf2O7 via diffraction and spectroscopyen_AU
dc.typeJournal Articleen_AU
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