Rietveld refinements of the crystal structures of Rb2XSi5O12 (X = Mn, Ni)

BELL, Anthony M. T. and HENDERSON, C. Michael B. (2016). Rietveld refinements of the crystal structures of Rb2XSi5O12 (X = Mn, Ni). In: British Crystallographic Association Spring Meeting, University of Nottingham, 4-7 April 2016. (Unpublished)

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Abstract

Poster Number: CCG06 Synthetic analogues of the silicate framework mineral leucite (KAlSi2O6) with the stoichiometry Rb2XSi5O12 (X = Mn, Ni) have been prepared by high temperature solid-state synthesis. Ambient temperature X-ray powder diffraction data have been collected on these samples. Analysis of these powder diffraction data show that these samples both consist of single phases [1] isostructural with the Pbca cation-ordered framework leucite structure of Cs2CdSi5O12 [2]. Rietveld refinement [3] shows that for X = Mn this crystal structure has complete Mn and Si cation order over the tetrahredrally coordinated sites (T-sites) in the silicate framework. However, for X = Ni, Rietveld refinement suggests that there may be some Ni and Si cation T-site cation disorder.

Item Type: Conference or Workshop Item (Poster)
Depositing User: Anthony Bell
Date Deposited: 28 Jul 2016 15:25
Last Modified: 19 Oct 2016 18:30
URI: http://shura.shu.ac.uk/id/eprint/12757

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