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Title: Neutron diffraction and MAS NMR of Cesium Tungstate defect pyrochlores

Abstract

Defect-pyrochlores based on the formulation CsM {sub 0.5}W{sub 1.5}O{sub 6} (M=Ti, Ti/Zr, Zr and Hf) have been studied using neutron diffraction and magic-angle spinning nuclear magnetic resonance (MAS NMR). The results show that structural changes are linearly linked to the change in ionic-radius for the B-site, e.g. the unit cell changes from 10.2763 A for CsTi{sub 0.5}W{sub 1.5}O{sub 6} to 10.3820 A for CsZr{sub 0.4}W{sub 1.6}O{sub 6}. Changes in the NMR chemical shift correlate with the change in electronegativity on the B-site, and show the presence of only one Cs crystal site.

Authors:
 [1];  [2];  [2]
  1. Department of Earth Sciences, Cambridge Centre for Ceramic Immobilisation (C3i), University of Cambridge, Downing Street, Cambridge CB2 3EQ (United Kingdom). E-mail: kwhi02@esc.cam.ac.uk
  2. Department of Earth Sciences, Cambridge Centre for Ceramic Immobilisation (C3i), University of Cambridge, Downing Street, Cambridge CB2 3EQ (United Kingdom)
Publication Date:
OSTI Identifier:
20784890
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 179; Journal Issue: 2; Other Information: DOI: 10.1016/j.jssc.2005.11.011; PII: S0022-4596(05)00516-5; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CESIUM COMPOUNDS; CESIUM IONS; CHEMICAL SHIFT; ELECTRONEGATIVITY; NEUTRON DIFFRACTION; NUCLEAR MAGNETIC RESONANCE; PYROCHLORE; TUNGSTATES

Citation Formats

Whittle, K.R., Lumpkin, G.R., and Ashbrook, S.E.. Neutron diffraction and MAS NMR of Cesium Tungstate defect pyrochlores. United States: N. p., 2006. Web. doi:10.1016/j.jssc.2005.11.011.
Whittle, K.R., Lumpkin, G.R., & Ashbrook, S.E.. Neutron diffraction and MAS NMR of Cesium Tungstate defect pyrochlores. United States. doi:10.1016/j.jssc.2005.11.011.
Whittle, K.R., Lumpkin, G.R., and Ashbrook, S.E.. Wed . "Neutron diffraction and MAS NMR of Cesium Tungstate defect pyrochlores". United States. doi:10.1016/j.jssc.2005.11.011.
@article{osti_20784890,
title = {Neutron diffraction and MAS NMR of Cesium Tungstate defect pyrochlores},
author = {Whittle, K.R. and Lumpkin, G.R. and Ashbrook, S.E.},
abstractNote = {Defect-pyrochlores based on the formulation CsM {sub 0.5}W{sub 1.5}O{sub 6} (M=Ti, Ti/Zr, Zr and Hf) have been studied using neutron diffraction and magic-angle spinning nuclear magnetic resonance (MAS NMR). The results show that structural changes are linearly linked to the change in ionic-radius for the B-site, e.g. the unit cell changes from 10.2763 A for CsTi{sub 0.5}W{sub 1.5}O{sub 6} to 10.3820 A for CsZr{sub 0.4}W{sub 1.6}O{sub 6}. Changes in the NMR chemical shift correlate with the change in electronegativity on the B-site, and show the presence of only one Cs crystal site.},
doi = {10.1016/j.jssc.2005.11.011},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 179,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}