High-temperature synchrotron X-ray powder diffraction study of Cs2XSi5O12 (X = Cd, Cu, Zn) leucites

BELL, Anthony M. T. and HENDERSON, C. Michael B. (2012). High-temperature synchrotron X-ray powder diffraction study of Cs2XSi5O12 (X = Cd, Cu, Zn) leucites. Mineralogical Magazine, 76 (5), 1257-1280.

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Abstract

Synchrotron X-ray powder diffraction data have been collected on three synthetic leucite analogues with the general formula Cs2XSi5O12 (X = Cd, Cu, Zn) between 295 and 1173 K. All three samples have the orthorhombic Pbca leucite structure at room temperature with ordered framework T-site cations. The sample with X = Cd retains the Pbca structure over the whole of the investigated temperature range. The sample with X = Cu also retains the Pbca structure, but there is a transition to a less distorted structure with a larger unit-cell volume at ~333 K. The sample with X = Zn shows evidence for a transition to a previously unknown Pa3¯ cubic structure, with some T-site cation disorder, at 566 K, on heating. This transition is reversible on cooling to 633 K.

Item Type:	Article
Additional Information:	Collaboration with the University of Manchester done when I worked on the DORIS-III synchrotron at the Deutsches Elektronen-Synchrotron (DESY) laboratory in Hamburg, Germany.
Identification Number:	https://doi.org/10.1180/minmag.2012.076.5.12
Page Range:	1257-1280
Depositing User:	Anthony Bell
Date Deposited:	09 Aug 2016 11:48
Last Modified:	18 Mar 2021 22:45
URI:	https://shura.shu.ac.uk/id/eprint/12790

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