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Rietveld refinement of the crystal structures of Rb(2) XSi(5)O(12) (X = Ni, Mn)
The synthetic leucite silicate framework mineral analogues Rb(2) XSi(5)O(12) {X = Ni [dirubidium nickel(II) pentasilicate] and Mn [dirubidium manganese(II) pentasilicate]} have been prepared by high-temperature solid-state synthesis. The results of Rietveld refinements, using X-ray powder diffract...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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International Union of Crystallography
2016
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770953/ https://www.ncbi.nlm.nih.gov/pubmed/26958399 http://dx.doi.org/10.1107/S2056989016001390 |
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author | Bell, Anthony M. T. Henderson, C. Michael B. |
author_facet | Bell, Anthony M. T. Henderson, C. Michael B. |
author_sort | Bell, Anthony M. T. |
collection | PubMed |
description | The synthetic leucite silicate framework mineral analogues Rb(2) XSi(5)O(12) {X = Ni [dirubidium nickel(II) pentasilicate] and Mn [dirubidium manganese(II) pentasilicate]} have been prepared by high-temperature solid-state synthesis. The results of Rietveld refinements, using X-ray powder diffraction data collected using Cu Kα X-rays, show that the title compounds crystallize in the space group Pbca and adopt the cation-ordered structure of Cs(2)CdSi(5)O(12) and other leucites. The structures consist of tetrahedral SiO(4) and XO(4) units sharing corners to form a partially substituted silicate framework. Extraframework Rb(+) cations sit in channels in the framework. All atoms occupy the 8c general position for this space group. In these refined structures, silicon and X atoms are ordered onto separate tetrahedrally coordinated sites (T-sites). However, the Ni displacement parameter and the Ni—O bond lengths suggest that for the X = Ni sample, there may actually be some T-site cation disorder. |
format | Online Article Text |
id | pubmed-4770953 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-47709532016-03-08 Rietveld refinement of the crystal structures of Rb(2) XSi(5)O(12) (X = Ni, Mn) Bell, Anthony M. T. Henderson, C. Michael B. Acta Crystallogr E Crystallogr Commun Research Communications The synthetic leucite silicate framework mineral analogues Rb(2) XSi(5)O(12) {X = Ni [dirubidium nickel(II) pentasilicate] and Mn [dirubidium manganese(II) pentasilicate]} have been prepared by high-temperature solid-state synthesis. The results of Rietveld refinements, using X-ray powder diffraction data collected using Cu Kα X-rays, show that the title compounds crystallize in the space group Pbca and adopt the cation-ordered structure of Cs(2)CdSi(5)O(12) and other leucites. The structures consist of tetrahedral SiO(4) and XO(4) units sharing corners to form a partially substituted silicate framework. Extraframework Rb(+) cations sit in channels in the framework. All atoms occupy the 8c general position for this space group. In these refined structures, silicon and X atoms are ordered onto separate tetrahedrally coordinated sites (T-sites). However, the Ni displacement parameter and the Ni—O bond lengths suggest that for the X = Ni sample, there may actually be some T-site cation disorder. International Union of Crystallography 2016-01-27 /pmc/articles/PMC4770953/ /pubmed/26958399 http://dx.doi.org/10.1107/S2056989016001390 Text en © Bell and Henderson 2016 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
spellingShingle | Research Communications Bell, Anthony M. T. Henderson, C. Michael B. Rietveld refinement of the crystal structures of Rb(2) XSi(5)O(12) (X = Ni, Mn) |
title | Rietveld refinement of the crystal structures of Rb(2)
XSi(5)O(12) (X = Ni, Mn) |
title_full | Rietveld refinement of the crystal structures of Rb(2)
XSi(5)O(12) (X = Ni, Mn) |
title_fullStr | Rietveld refinement of the crystal structures of Rb(2)
XSi(5)O(12) (X = Ni, Mn) |
title_full_unstemmed | Rietveld refinement of the crystal structures of Rb(2)
XSi(5)O(12) (X = Ni, Mn) |
title_short | Rietveld refinement of the crystal structures of Rb(2)
XSi(5)O(12) (X = Ni, Mn) |
title_sort | rietveld refinement of the crystal structures of rb(2)
xsi(5)o(12) (x = ni, mn) |
topic | Research Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770953/ https://www.ncbi.nlm.nih.gov/pubmed/26958399 http://dx.doi.org/10.1107/S2056989016001390 |
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