Structures and crystal chemistry of the double perovskites Ba(2)LnB'O6 (Ln = lanthanide B'=Nb5+ and Ta5+), Part I - investigation of Ba(2)LnTaO(6) using synchrotron x-ray and neutron powder diffraction

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dc.contributor.authorSaines, PJen_AU
dc.contributor.authorSpencer, JRen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorAvdeev, Men_AU
dc.date.accessioned2009-10-02en_AU
dc.date.accessioned2010-04-30T05:06:14Zen_AU
dc.date.available2009-10-02en_AU
dc.date.available2010-04-30T05:06:14Zen_AU
dc.date.issued2007-11en_AU
dc.date.statistics2007-11en_AU
dc.description.abstractThe structure of 14 compounds in the series Ba(2)LnTaO(6) have been examined using synchrotron X-ray diffraction and found to undergo a sequence of phase transitions from I2/m monoclinic to I4/m tetragonal to Fm (3) over barm cubic symmetry with decreasing ionic radii of the lanthanides. Ba2LaTaO6 is an exception to this with variable temperature neutron diffraction being used to establish that the full series of phases adopted over the range of 15-500 K is P2(1)/n monoclinic to I2/m monoclinic to R (3) over bar rhombohedral. The chemical environments of these compounds have also been investigated and the overbonding to the lanthanide cations is due to the unusually large size for the B-site in these perovskites. © 2007, Elsevier Ltd.en_AU
dc.identifier.citationSaines, P. J., Spencer, J. R., Kennedy, B. J., & Avdeev, M. (2007). Structures and crystal chemistry of the double perovskites Ba(2)LnB'O6 (Ln = lanthanide B'=Nb5+ and Ta5+), Part I - investigation of Ba(2)LnTaO(6) using synchrotron x-ray and neutron powder diffraction. Journal of Solid State Chemistry, 180(11), 2991-3000. doi:10.1016/j.jssc.2007.08.009en_AU
dc.identifier.govdoc1400en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.issue11en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination2991-3000en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jssc.2007.08.009en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1911en_AU
dc.identifier.volume180en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPerovskitesen_AU
dc.subjectPhase transformationsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectRare earthsen_AU
dc.subjectSynchrotronsen_AU
dc.titleStructures and crystal chemistry of the double perovskites Ba(2)LnB'O6 (Ln = lanthanide B'=Nb5+ and Ta5+), Part I - investigation of Ba(2)LnTaO(6) using synchrotron x-ray and neutron powder diffractionen_AU
dc.typeJournal Articleen_AU
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