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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bell, Anthony Martin Thomas
Sheffield Hallam University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Atom Probe Tomography Investigation of Clustering in Model P2O5-Doped Borosilicate Glasses for Nuclear Waste Vitrification
- 2023Dynamic high‐temperature crystallization and processing properties of industrial soda–lime–silica glassescitations
- 2021Thermostructural and Elastic Properties of PbTe and Pb0.884Cd0.116Te: A Combined Low-Temperature and High-Pressure X-ray Diffraction Study of Cd-Substitution Effectscitations
- 2021Crystal structures and X-ray powder diffraction data for Cs2NiSi5O12, RbGaSi2O6, and CsGaSi2O6 synthetic leucite analogues
- 2020X-ray Fluorescence Analysis of Feldspars and Silicate Glass: Effects of Melting Time on Fused Bead Consistency and Volatilisationcitations
- 2016Rietveld refinement of the crystal structures of Rb2XSi5O12(X= Ni, Mn)citations
- 2013Synchrotron X-ray powder diffraction study on synthetic Sr-Fresnoitecitations
- 2012High-temperature synchrotron X-ray powder diffraction study of Cs2XSi5O12(X = Cd, Cu, Zn) leucitescitations
- 2010Revision of the structure of Cs2CuSi5O12 leucite as orthorhombic Pbcacitations
- 2010Structural evolution of aqueous mercury sulphide precipitates: energy-dispersive X-ray diffraction studiescitations
- 2009Crystal structures and cation ordering in Cs2MgSi5O12, Rb2MgSi5O12 and Cs2ZnSi5O12 leucitescitations
- 2009Synchrotron X-ray absorption spectroscopy and X-ray powder diffraction studies of the structure of johnbaumite [Ca10(AsO4)6(OH,F)2] and synthetic Pb-, Sr- and Ba-arsenate apatites and some comments on the crystal chemistry of the apatite structure type in generalcitations
- 2008Polymorphism in cyclohexanolcitations
- 2001Chemically induced magnetism and magnetoresistance in La(0.8)Sr(1.2)Mn(0.6)Rh(0.4)O(4).
Places of action
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article
Crystal structures and cation ordering in Cs2MgSi5O12, Rb2MgSi5O12 and Cs2ZnSi5O12 leucites
Abstract
<jats:p>The crystal structures of the leucite analogues Cs<jats:sub>2</jats:sub>MgSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub>, Cs<jats:sub>2</jats:sub>ZnSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> and Rb<jats:sub>2</jats:sub>MgSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> have been determined by synchrotron X-ray powder diffraction using Rietveld refinement in conjunction with <jats:sup>29</jats:sup>Si MAS NMR spectroscopy. These leucites are framework structures with distinct tetrahedral sites (<jats:italic>T</jats:italic> sites) occupied by Si and a divalent cation (either Mg or Zn in these samples); there is also a monovalent extra-framework cation (either Cs or Rb in these samples). The refined crystal structures were based on the <jats:italic>Pbca</jats:italic> leucite structure of Cs<jats:sub>2</jats:sub>CdSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub>, thus a framework with five ordered Si <jats:italic>T</jats:italic> sites and one ordered Cd <jats:italic>T</jats:italic> site was used as the starting model for refinement. <jats:sup>29</jats:sup>Si MAS NMR shows five distinct Si <jats:italic>T</jats:italic> sites for Cs<jats:sub>2</jats:sub>MgSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> and Rb<jats:sub>2</jats:sub>MgSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub>, but six Si <jats:italic>T</jats:italic> sites for Cs<jats:sub>2</jats:sub>ZnSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub>. The refined structures for Cs<jats:sub>2</jats:sub>MgSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> and Rb<jats:sub>2</jats:sub>MgSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> were determined with complete <jats:italic>T</jats:italic>-site ordering, but the refined structure for Cs<jats:sub>2</jats:sub>ZnSi<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> was determined with partial disorder of Mg and Si over two of the <jats:italic>T</jats:italic> sites.</jats:p>