Long-range-ordered coexistence of 4-, 5-, and 6-coordinate niobium in the mixed ionic-electronic conductor γ-Ba4Nb2O9

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dc.contributor.authorDunstan, MTen_AU
dc.contributor.authorBlanc, Fen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorGrey, CPen_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2013-11-24T22:44:41Zen_AU
dc.date.available2013-11-24T22:44:41Zen_AU
dc.date.issued2013-07-16en_AU
dc.date.statistics2013-11-25en_AU
dc.description.abstractIn a study combining high-resolution single-crystal neutron diffraction and solid-state nuclear magnetic resonance, the mixed ionic-electronic conductor Gamma-Ba4Nb2O9 is shown to have a unique structure type, incorporating niobium in 4-, 5-, and 6-coordinate environments. The 4- and 5-coordinate niobium tetrahedra and trigonal bipyrimids exist in discrete layers, within and among which their orientations vary systematically to form a complex superstructure. Through analysis and comparison of data obtained from hydrated versus dehydrated samples, a mechanism is proposed for the ready hydration of the material by atmospheric water. This mechanism, and the resulting hydrated structure, help explain the high protonic and oxide ionic conductivity of Gamma-Ba4Nb2O9. © 2013, American Chemical Society.en_AU
dc.identifier.citationDunstan, M. T., Blanc, F., Avdeev, M., McIntyre, G. J., Grey, C. P., & Ling, C. D. (2013). Long-range-ordered coexistence of 4-, 5-, and 6-coordinate niobium in the mixed ionic-electronic conductor γ-Ba4Nb2O9. Chemistry of Materials, 25 (15), 3154-3161. doi:10.1021/cm4014656en_AU
dc.identifier.govdoc5043en_AU
dc.identifier.issn0897-4756en_AU
dc.identifier.issue15en_AU
dc.identifier.journaltitleChemistry of Materialsen_AU
dc.identifier.pagination3154-3161en_AU
dc.identifier.urihttps://doi.org/10.1021/cm4014656en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4997en_AU
dc.identifier.volume25en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectNiobium compoundsen_AU
dc.subjectBariumen_AU
dc.subjectPerovskitesen_AU
dc.subjectSpectroscopyen_AU
dc.subjectNiobatesen_AU
dc.subjectWateren_AU
dc.titleLong-range-ordered coexistence of 4-, 5-, and 6-coordinate niobium in the mixed ionic-electronic conductor γ-Ba4Nb2O9en_AU
dc.typeJournal Articleen_AU
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