Cation disorder in NaW2O6+δ·nH2−zO post-ion exchange with K, Rb, Sr, and Cs

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dc.contributor.authorThorogood, GJen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorHanna, JVen_AU
dc.contributor.authorLuca, Ven_AU
dc.date.accessioned2012-02-09T01:31:59Zen_AU
dc.date.available2012-02-09T01:31:59Zen_AU
dc.date.issued2011-06-01en_AU
dc.date.statistics2012-02-09en_AU
dc.description.abstractThe structure of the defect pyrochlore NaW2O6+delta center dot nH(2-z)O after ion exchange with K, Rb, Sr or Cs for Na has been investigated using thermal analysis, solid-state nuclear magnetic resonance, laboratory X-ray and neutron diffraction methods. Neutron diffraction studies show that both the A-type cations (Na+, K+, Rb+, and/or Cs+) and the water molecules reside within the channels that form in the 111 direction of the W2O6 framework and that these strongly interact. The analytical results suggest that the water and A-type cations compete for space in the tunnels within the W2O6 pyrochlore framework, with the total number of water molecules and cations being approximately constant in the six samples investigated. The interplay between the cations and water explains the non-linear dependence of the a lattice parameter on the choice of cation. It appears that the ion-exchange capacity of the material will be controlled by the amount of water initially present in the sample. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.en_AU
dc.identifier.citationThorogood, G.J., Kennedy, B.J., Avdeev, M., Peterson, V.K., Hanna, J.V., Luca, V. (2011). Cation disorder in NaW2O6+δ·nH2−zO post-ion exchange with K, Rb, Sr, and Cs. Journal of Physics and Chemistry of Solids, 72(6), 692-700. doi:10.1016/j.jpcs.2011.02.018en_AU
dc.identifier.govdoc3834en_AU
dc.identifier.issn0022-3697en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitleJournal of Physics and Chemistry of Solidsen_AU
dc.identifier.pagination692-700en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jpcs.2011.02.018en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3998en_AU
dc.identifier.volume72en_AU
dc.language.isoenen_AU
dc.publisherPergamon-Elsevier Science Ltden_AU
dc.subjectX-ray diffractionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCationsen_AU
dc.subjectNuclear magnetic resonanceen_AU
dc.subjectCesiumen_AU
dc.subjectAluminiumen_AU
dc.titleCation disorder in NaW2O6+δ·nH2−zO post-ion exchange with K, Rb, Sr, and Csen_AU
dc.typeJournal Articleen_AU
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