Transitions between P21, P63 (√ 3A), and P6322 modifications of SrAl2O4 by in situ high-temperature x-ray and neutron diffraction

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dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorYakovlev, Sen_AU
dc.contributor.authorYaremchenko, AAen_AU
dc.contributor.authorKharton, VVen_AU
dc.date.accessioned2020-11-11T22:19:01Zen_AU
dc.date.available2020-11-11T22:19:01Zen_AU
dc.date.issued2007-12-01en_AU
dc.date.statistics2020-11-05en_AU
dc.description.abstractThe results of in situ high-temperature X-ray and neutron powder diffraction experiments reconcile inconsistencies in previous reports on the symmetry of high-temperature phases of SrAl2O4. The material undergoes two reversible phase transitions P21↔P63(3A) and P63(3A)↔P6322 at ∼680 and ∼860°C, respectively, and the latter one is experimentally observed and characterized for the first time. The higher symmetry above the P63(3A)↔P6322 transition is gained by disordering off-center split site of oxygen atoms around trigonal axis rather than by unbending Al–O–Al angle to the ideal value 180°. The analysis of the literature suggests that it is a common feature of the P6322 phases of stuffed tridymites.© 2007 Elsevier Inc.en_AU
dc.identifier.citationAvdeev, M., Yakovlev, S., Yaremchenko, A. A., & Kharton, V. V. (2007). Transitions between P21, P63 (√ 3A), and P6322 modifications of SrAl2O4 by in situ high-temperature x-ray and neutron diffraction. Journal of Solid State Chemistry, 180(12), 3535-3544, doi:10.1016/j.jssc.2007.10.021en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination3535-3544en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jssc.2007.10.021en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/9978en_AU
dc.identifier.volume180en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPhase transformationsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectCrystal structureen_AU
dc.subjectSymmetryen_AU
dc.subjectOxygenen_AU
dc.titleTransitions between P21, P63 (√ 3A), and P6322 modifications of SrAl2O4 by in situ high-temperature x-ray and neutron diffractionen_AU
dc.typeJournal Articleen_AU
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