Structural phase transitions in BaPrO3

Saines, P.J., Kennedy, B.J., Smith, R.I. (2009) Structural phase transitions in BaPrO3. Materials Research Bulletin, 44 (4). pp. 874-879. ISSN 00255408 (ISSN). (doi:10.1016/j.materresbull.2008.09.013) (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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The crystal structures adopted by BaPrO3 at and above ambient temperature have been examined using a combination of synchrotron X-ray and neutron diffraction. BaPrO3 has been established to undergo a series of phase transitions from P b n m orthorhombic â?? I b m m orthorhombic â?? R over(3, Ì?) c rhombohedral â?? P m over(3, Ì?) m cubic. BaPrO3 is the second A2+B4+O3 perovskite found to adopt rhombohedral symmetry in preference to the I4/mcm tetragonal structure. Analysis of the octahedral tilting through the rhombohedral to cubic phase transition indicates that this transformation is continuous and tricritical in nature. The tricritical behaviour of this transition is likely to be a result of the competition between tetragonal and rhombohedral structures to be the preferred phase, with the rhombohedral symmetry adopted by BaPrO3 being stabilised by the unusually large B-site cation. © 2008 Elsevier Ltd. All rights reserved.

Item Type: Article
DOI/Identification number: 10.1016/j.materresbull.2008.09.013
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Mater Res Bull [Field not mapped to EPrints] AD - School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia [Field not mapped to EPrints] AD - ISIS Facility, Rutherford Appleton Laboratory, Chilton, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: A. Oxides, C. Neutron scattering, C. X-ray diffraction, D. Crystal structure, Crystal structure, Diffraction, Fourier transforms, Neutron diffraction, Neutron scattering, Neutrons, Oxide minerals, Perovskite, Polymorphism, X ray analysis, X ray diffraction, A. Oxides, Ambient temperatures, B-site cations, C. Neutron scattering, C. X-ray diffraction, Cubic phase, D. Crystal structure, Octahedral tilting, Rhombohedral structures, Rhombohedral symmetries, Structural phase transitions, Tetragonal structures, X-ray and neutron diffractions, Phase transitions
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 10:13 UTC
Last Modified: 29 May 2019 16:04 UTC
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