Crystal structures and phase transitions in a-site deficient perovskites Ln1/3TaO3

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dc.contributor.authorZhou, QDen_AU
dc.contributor.authorSaines, PJen_AU
dc.contributor.authorSharma, Nen_AU
dc.contributor.authorTing, Jen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorZhang, Zen_AU
dc.contributor.authorWithers, RLen_AU
dc.contributor.authorWallwork, KSen_AU
dc.date.accessioned2010-09-03T03:32:46Zen_AU
dc.date.available2010-09-03T03:32:46Zen_AU
dc.date.issued2008-11-11en_AU
dc.date.statistics2008-11-11en_AU
dc.description.abstractThe synthesis and structures of the perovskites Ln1/3TaO3 are described. As the size of the Ln cation is reduced, the compounds display a sequence of structure: P4/mmm/La → Cmmm/Ce−Gd → Pmma/Tb, Dy → Pmc21/Ho, Er. Although apparently tetragonal in P4/mmm, electron diffraction patterns of Tm1/3TaO3 reveal this has a complex incommensurate structure. Likewise Gd1/3TaO3 appears metrically tetragonal, but electron diffraction and synchrotron X-ray powder diffraction demonstrate this is actually orthorhombic. The suppression of the spontaneous orthorhombic strain in Gd1/3TaO3 is thought to be due to the proximity to the first-order Cmmm−Pmma transition. Variable temperature studies show both Tb1/3TaO3 and Dy1/3TaO3 undergo a first-order Cmmm−Pmma transition upon heating. © 2008, American Chemical Societyen_AU
dc.identifier.citationZhou, Q. D., Saines, P. J., Sharma, N., Ting, J., Kennedy, B. H., Zhang, Z., Withers, R. L., & Wallwork, K. S. (2008). Crystal structures and phase transitions in a-site deficient perovskites Ln1/3TaO3. Chemistry of Materials, 20(21), 6666–6676. doi:10.1021/cm8014868en_AU
dc.identifier.govdoc2604en_AU
dc.identifier.issn0897-4756en_AU
dc.identifier.issue21en_AU
dc.identifier.journaltitleChemistry of Materialsen_AU
dc.identifier.pagination6666-6676en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/cm8014868en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2444en_AU
dc.identifier.volume20en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectCrystal structureen_AU
dc.subjectPerovskitesen_AU
dc.subjectPhase transformationsen_AU
dc.subjectElectron diffractionen_AU
dc.subjectOrthorhombic latticesen_AU
dc.subjectHeatingen_AU
dc.titleCrystal structures and phase transitions in a-site deficient perovskites Ln1/3TaO3en_AU
dc.typeJournal Articleen_AU
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