Distinct intercalation and conduction behaviors within an isostructural series Ba5R2Al2SnO1

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dc.contributor.authorBrown, AJen_AU
dc.contributor.authorWagstaff, OJen_AU
dc.contributor.authorEvans, IRen_AU
dc.contributor.authorEvans, JSOen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorWykes, JLen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2025-01-09T03:22:43Zen_AU
dc.date.available2025-01-09T03:22:43Zen_AU
dc.date.issued2024-07-30en_AU
dc.date.statistics2024-08-09en_AU
dc.description.abstractThe series Ba5R2Al2SnO13 (R = In, Y, Er, Ho, Tb) has been synthesized and structurally characterized by X-ray and neutron powder diffraction. All members have oxygen-deficient 10-layer hexagonal (10H) perovskite-type structures at high temperature and gain mass on cooling equivalent to ∼0.5 oxygen atoms per formula unit, observed by both thermogravimetric analysis and the occupancy of a vacant site in the oxygen substructure refined against neutron powder diffraction data. The origin of this mass gain varies with R: for R = In, Y, Er, and Ho, it is due to water uptake via a hydroxylation mechanism to form Ba5R2Al2SnO13.xH2O (x ≤ 0.5), with OH– ions occupying the vacant site and the other proton forming a second OH– in the oxygen substructure; while for R = Tb, it due to the oxidation of Tb3+ to Tb4+, with O2– ions occupying the vacant site. These chemico-structural differences are consistent with the measured conductivity behavior of the samples, whereby Ba5Er2Al2SnO13 is a proton conductor in air at moderate temperatures (∼10–4 S cm–1 at 500 °C) while Ba5Tb2Al2SnO13 is a mixed oxide ionic and electronic conductor. These differences were further confirmed by X-ray absorption spectroscopy and corroborated by quasielastic neutron scattering. © 2024 American Chemical Society.en_AU
dc.description.sponsorshipWe acknowledge ANSTO for beamtime award on the Australian Synchrotron (PD and MEX1 beamlines) and the Australian Centre for Neutron Scattering (Echidna and Pelican beamlines). XRPD data were collected at Sydney Analytical, a Core Research Facility at the University of Sydney. We thank Durham University for a Durham Doctoral Scholarship to OJW.en_AU
dc.identifier.citationBrown, A. J., Wagstaff, O. J., Evans, I. R., Evans, J. S. O., Mole, R. A., Wykes, J., Avdeev, M., & Ling, C. D. (2024). Distinct intercalation and conduction behaviors within an isostructural series Ba5R2Al2SnO13. Chemistry of Materials, 36(17), 8188-8198. doi:10.1021/acs.chemmater.4c00580en_AU
dc.identifier.issn0897-4756en_AU
dc.identifier.issn1520-5002en_AU
dc.identifier.issue17en_AU
dc.identifier.journaltitleChemistry of Materialsen_AU
dc.identifier.pagination8188-8198en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.chemmater.4c00580en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15865en_AU
dc.identifier.volume36en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectAluminiumen_AU
dc.subjectRheniumen_AU
dc.subjectBariumen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectTemperature rangeen_AU
dc.subjectOxidesen_AU
dc.subjectElectric conductorsen_AU
dc.subjectSpectroscopyen_AU
dc.subjectAtmospheric chemistryen_AU
dc.subjectGranular materialsen_AU
dc.subjectOxygenen_AU
dc.titleDistinct intercalation and conduction behaviors within an isostructural series Ba5R2Al2SnO1en_AU
dc.typeJournal Articleen_AU
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