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Crystal structure of A-site deficient La0.2Sr0.2-xCaxTiO3 perovskite at ambient conditions and high temperatures : a neutron powder diffraction study
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dc.contributor.author | Aljaberi, Ahmed Daghash | |
dc.contributor.author | Irvine, John Thomas Sirr | |
dc.date.accessioned | 2015-06-03T11:10:03Z | |
dc.date.available | 2015-06-03T11:10:03Z | |
dc.date.issued | 2015-06-21 | |
dc.identifier.citation | Aljaberi , 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/C5DT00238A | en |
dc.identifier.issn | 1477-9226 | |
dc.identifier.other | PURE: 173591275 | |
dc.identifier.other | PURE UUID: 0dc83256-9f36-4526-9e3a-7063a90b0e54 | |
dc.identifier.other | Scopus: 84930653598 | |
dc.identifier.other | WOS: 000355701000033 | |
dc.identifier.other | ORCID: /0000-0002-8394-3359/work/68280758 | |
dc.identifier.uri | https://hdl.handle.net/10023/6739 | |
dc.description | The 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.abstract | The 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.iso | eng | |
dc.relation.ispartof | Dalton Transactions | en |
dc.rights | Copyright 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.subject | QD Chemistry | en |
dc.subject | NDAS | en |
dc.subject.lcc | QD | en |
dc.title | Crystal structure of A-site deficient La0.2Sr0.2-xCaxTiO3 perovskite at ambient conditions and high temperatures : a neutron powder diffraction study | en |
dc.type | Journal article | en |
dc.contributor.sponsor | The Royal Society | en |
dc.contributor.sponsor | EPSRC | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | https://doi.org/10.1039/C5DT00238A | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | WRMA 2012/R2 | en |
dc.identifier.grantnumber | EP/K015540/1 | en |
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