Journal
CHEMICAL PHYSICS LETTERS
Volume 378, Issue 3-4, Pages 395-399Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2003.07.014
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Accurate nuclear density distribution of cubic bismuth oxide (delta-Bi2O3) has been obtained by the maximum entropy method (MEM)-based pattern fitting combined with the Rietveld method using neutron-powder-diffraction data. The result shows for the first time that the oxide ions have a complicated disorder spreading over a wide area and shift to the <111> directions from the ideal fluorite site. These features are responsible for the high oxide-ion conductivity. (C) 2003 Elsevier B.V. All rights reserved.
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