The Jahn-Teller distortion and cation ordering in the perovskite Sr2MnSbO6

Cheah, M. and Saines, P.J. and Kennedy, B.J. (2006) The Jahn-Teller distortion and cation ordering in the perovskite Sr2MnSbO6. Journal of Solid State Chemistry, 179 (6). pp. 1775-1781. ISSN 00224596 (ISSN). (doi:https://doi.org/10.1016/j.jssc.2006.03.013) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

The perovskite Sr2MnSbO6 has been synthesized using conventional ceramic techniques and structurally characterized using high-resolution powder X-ray and neutron diffraction. The structure is tetragonal in space group I 4 / m. The octahedra were found to feature Jahn-Teller (JT) distortion due to the presence of Mn3+, and this is identified as strongly contributing to the octahedral tilting. Evidence for B-site cation ordering is presented however there is extensive anti-site disorder. The disordering of the Mn3+ and Sb5+ cations is believed to be a result of the similar size of these two cations and the polarizability of the Sb5+ cation. The structure was found to undergo a transition to cubic symmetry at 521 °C with removal of the octahedral tilting leading to the quenching of the JT distortion. This phase transition was found to be continuous and tricritical in nature. © 2006 Elsevier Inc. All rights reserved.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - J. Solid State Chem. [Field not mapped to EPrints] AD - Centre for Structural Biology and Structural Chemistry, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Jahn-Tellar distortion, Ordered perovskite, Phase transition, Order disorder transitions, Phase transitions, Polarization, Positive ions, Quenching, Strontium compounds, Synthesis (chemical), Cubic symmetry, Jahn-Tellar distortion, Ordered perovskite, Polarizability, Perovskite
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Paul Saines
Date Deposited: 07 Oct 2015 10:29 UTC
Last Modified: 07 Oct 2015 10:29 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50748 (The current URI for this page, for reference purposes)
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