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Bi1−xNbxO1.5+x (x=0.0625, 0.12) fast ion conductors: structures, stability and oxide ion migration pathways

Tate, Matthew L.; Hack, Jennifer; Kuang, Xiaojun; McIntyre, Garry J.; Withers, Ray L.; Johnson, Mark R.; Radosavljevic Evans, Ivana


A combined experimental and computational study of Bi1−xNbxO1.5+x (x=0.0625 and 0.12) has been carried out using laboratory X-ray, neutron and electron diffraction, impedance measurements and ab-initio molecular dynamics. We demonstrate that Bi0.9375Nb0.0625O1.5625, previously reported to adopt a cubic fluorite-type superstructure, can form two different polymorphs depending on the synthetic method: a metastable cubic phase is produced by quenching; while slower cooling yields a stable material...[Show more]

CollectionsANU Research Publications
Date published: 2015-05
Type: Journal article
Source: Journal of Solid State Chemistry
DOI: 10.1016/j.jssc.2015.01.006


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