Show simple item record

Files in this item

Thumbnail

Item metadata

dc.contributor.authorAljaberi, Ahmed Daghash
dc.contributor.authorIrvine, John Thomas Sirr
dc.date.accessioned2015-06-03T11:10:03Z
dc.date.available2015-06-03T11:10:03Z
dc.date.issued2015-06-21
dc.identifier.citationAljaberi , A D & Irvine , J T S 2015 , ' Crystal structure of A-site deficient La 0.2 Sr 0.2-x Ca x TiO 3 perovskite at ambient conditions and high temperatures : a neutron powder diffraction study ' , Dalton Transactions , vol. 44 , no. 23 , pp. 10828-10833 . https://doi.org/10.1039/C5DT00238Aen
dc.identifier.issn1477-9226
dc.identifier.otherPURE: 173591275
dc.identifier.otherPURE UUID: 0dc83256-9f36-4526-9e3a-7063a90b0e54
dc.identifier.otherScopus: 84930653598
dc.identifier.otherWOS: 000355701000033
dc.identifier.otherORCID: /0000-0002-8394-3359/work/68280758
dc.identifier.urihttp://hdl.handle.net/10023/6739
dc.descriptionThe authors thank the Government of the United Arab Emirates for sponsoring this project, the EPSRC for Platform grant support and the Royal Society for a Wolfson Research Merit Award.en
dc.description.abstractThe crystal structures of several solid solutions of the perovskite La0.2Sr0.7-xCaxTiO3 were determined using the Rietveld analysis of neutron powder diffraction patterns collected at room temperature and at high temperatures. At room temperature, samples showed a tetragonal I4/mcm symmetry for compositions with 0.1 ≤ x ≤ 0.35 followed by a phase transition to orthorhombic Pbnm symmetry for compositions with 0.4 ≤ x ≤ 0.7. Samples with the orthorhombic symmetry showed two reversible phase transitions in the temperature range 20oC – 900oC. The first transition was a discontinuous Pbnm – I4/mcm around 300oC and the second was a continuous I4/mcm - Pm3 ̅m transition below 900oC. The lower symmetries resulted from very small distortions and changes in tilts of the BO6 octahedra of this perovskite; which was a direct result from the A-site ionic radius mismatch.
dc.language.isoeng
dc.relation.ispartofDalton Transactionsen
dc.rightsCopyright 2015 the Authors. This open access article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/)en
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subject.lccQDen
dc.titleCrystal structure of A-site deficient La0.2Sr0.2-xCaxTiO3 perovskite at ambient conditions and high temperatures : a neutron powder diffraction studyen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.identifier.doihttps://doi.org/10.1039/C5DT00238A
dc.description.statusPeer revieweden


This item appears in the following Collection(s)

Show simple item record