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Synthesis and structural studies of lanthanide substituted bismuth-titanium pyrochlores.

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Ting, Jimmy; Kennedy, Brendan James; Withers, Raymond; Avdeev, Maxim

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The identity of the pyrochlore phase seen during the synthesis of ferroelectric Bi4-xLnxTi3O12 Aurivillius oxides is shown to be Bi2/3Ln4/3Ti2O7. This pyrochlore is only stable for Ln3+=Sm3+ or smaller. For larger lanthanides the layered Aurivillius oxide is favoured. The presence of six-fold disorder, associated with the Bi 6s2 lone pair electrons, is believed to stabilise the unexpected stoichiometry of this oxide. Precise structures, obtained by Rietveld refinement from synchrotron X-ray...[Show more]

dc.contributor.authorTing, Jimmy
dc.contributor.authorKennedy, Brendan James
dc.contributor.authorWithers, Raymond
dc.contributor.authorAvdeev, Maxim
dc.date.accessioned2015-12-10T22:34:56Z
dc.identifier.issn0022-4596
dc.identifier.urihttp://hdl.handle.net/1885/56076
dc.description.abstractThe identity of the pyrochlore phase seen during the synthesis of ferroelectric Bi4-xLnxTi3O12 Aurivillius oxides is shown to be Bi2/3Ln4/3Ti2O7. This pyrochlore is only stable for Ln3+=Sm3+ or smaller. For larger lanthanides the layered Aurivillius oxide is favoured. The presence of six-fold disorder, associated with the Bi 6s2 lone pair electrons, is believed to stabilise the unexpected stoichiometry of this oxide. Precise structures, obtained by Rietveld refinement from synchrotron X-ray diffraction data, of three examples Ln3+=Eu, Ho and Yb are presented.
dc.publisherAcademic Press
dc.sourceJournal of Solid State Chemistry
dc.subjectKeywords: Bismuth; Europium; Ferroelectricity; Holmium; Rietveld method; Rietveld refinement; Semiconducting bismuth compounds; Stoichiometry; Titanium; X ray diffraction; Ytterbium; Aurivillius; Bismuth pyrochlore; Ferroelectric; Lanthanide substituted bismuth tit Bismuth pyrochlore; Crystal structure; Ferroelectric; Lanthanide substituted bismuth titanate
dc.titleSynthesis and structural studies of lanthanide substituted bismuth-titanium pyrochlores.
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume182
dc.date.issued2009
local.identifier.absfor030206 - Solid State Chemistry
local.identifier.ariespublicationu4217927xPUB350
local.type.statusPublished Version
local.contributor.affiliationTing, Jimmy, University of Sydney
local.contributor.affiliationKennedy, Brendan James, University of Sydney
local.contributor.affiliationWithers, Raymond, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationAvdeev, Maxim, Australian Nuclear Science and Technology Organisation
local.description.embargo2037-12-31
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage836
local.bibliographicCitation.lastpage840
local.identifier.doi10.1016/j.jssc.2008.12.030
dc.date.updated2016-02-24T10:42:40Z
local.identifier.scopusID2-s2.0-62849126476
local.identifier.thomsonID000265122500024
CollectionsANU Research Publications

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