New apatite‐type oxide ion conductor, Bi2La8[(GeO4)6]O3: structure, properties, and direct imaging of low‐level interstitial oxygen atoms using aberration‐corrected scanning transmission electron microscopy

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dc.contributor.authorTate, MLen_AU
dc.contributor.authorBlom, DAen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorBrand, HEAen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorVogt, Ten_AU
dc.contributor.authorEvans, IRen_AU
dc.date.accessioned2021-02-10T22:13:30Zen_AU
dc.date.available2021-02-10T22:13:30Zen_AU
dc.date.issued2017-02-23en_AU
dc.date.statistics2021-01-11en_AU
dc.description.abstractThe new solid electrolyte Bi2La8[(GeO4)6]O3 is prepared and characterized by variable‐temperature synchrotron X‐ray and neutron diffraction, aberration‐corrected scanning transmission electron microscopy, and physical property measurements (impedance spectroscopy and second harmonic generation). The material is a triclinic variant of the apatite structure type and owes its ionic conductivity to the presence of oxide ion interstitials. A combination of annular bright‐field scanning transmission electron microscopy experiments and frozen‐phonon multislice simulations enables direct imaging of the crucial interstitial oxygen atoms present at a level of 8 out of 1030 electrons per formula unit of the material, and crystallographically disordered, in the unit cell. Scanning transmission electron microscopy also leads to a direct observation of the local departures from the centrosymmetric average structure determined by diffraction. As no second harmonic generation signal is observed, these displacements are non‐cooperative on the longer length scales probed by optical methods. © 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheimen_AU
dc.identifier.articlenumber1605625en_AU
dc.identifier.citationTate, M. L., Blom, D. A., Avdeev, M., Brand, H. E. A., McIntyre, G. J., Vogt, T., & Evans, I. R. (2017). New apatite‐type oxide ion conductor, Bi2La8[(GeO4)6]O3: structure, properties, and direct imaging of low‐level interstitial oxygen atoms using aberration‐corrected scanning transmission electron microscopy. Advanced Functional Materials, 27(8), 1605625. doi:10.1002/adfm.201605625en_AU
dc.identifier.issn1616-3028en_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleAdvanced Functional Materialsen_AU
dc.identifier.urihttps://doi.org/10.1002/adfm.201605625en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10352en_AU
dc.identifier.volume27en_AU
dc.language.isoenen_AU
dc.publisherWileyen_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectIonic conductivityen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectElectrolytesen_AU
dc.subjectSpectroscopyen_AU
dc.titleNew apatite‐type oxide ion conductor, Bi2La8[(GeO4)6]O3: structure, properties, and direct imaging of low‐level interstitial oxygen atoms using aberration‐corrected scanning transmission electron microscopyen_AU
dc.typeJournal Articleen_AU
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