| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mclaughlin, Abbie
University of Aberdeen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2022Variable Temperature Neutron Diffraction Study of the Oxide Ion Conductor Ba3VWO8.5citations
- 2021A pressure induced reversal to the 9R perovskite in Ba3MoNbO8.5citations
- 2018Physicochemical Toolscitations
- 2017An investigation of the electronic, structural and magnetic properties of the ruddlesden-popper phase Sr3RuCoO7citations
- 2016An investigation of the optical properties and water splitting potential of the coloured metallic perovskites Sr1-xBaxMoO3citations
- 2016A Variable Temperature Synchrotron X-ray Diffraction Study of Colossal Magnetoresistant NdMnAsO0.95F0.05citations
- 2016The Structure and Optical Properties of Sr1-xCaxMoO3citations
- 2014Structural and magnetic characterisation of the novel spin frustrated double perovskite Sr2ScMoO6citations
- 2010Valence bond glass on an fcc lattice in the double perovskite Ba2YMoO6citations
- 2010Persistence of the valence bond glass state in the double perovskites Ba2-xSrxYMoO6citations
- 2006Magnetic and structural studies of the double perovskites Ba2REMoO6citations
- 2006Defect structure of ferromagnetic superconducting RuSr2GdCu2O8citations
- 2003Magnetotransport properties of doped RuSr2GdCu2O8citations
Places of action
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article
Variable Temperature Neutron Diffraction Study of the Oxide Ion Conductor Ba3VWO8.5
Abstract
Ba3VWO8.5 is an oxide ion conductor with a bulk conductivity of 5.0 x 10-5 S cm-1 at 600 °C. Ba3VWO8.5 is anomalous to the other Ba3M’M’’O8.5 (M’ = Nb; M’’= Mo, W) oxide ionic conductors, as it exhibits cation order with vanadium and tungsten on the M1 site only. Here we report a variable temperature neutron diffraction study of Ba3VWO8.5 that demonstrates cation order is retained up to 800 °C. We show for the first time that the structural rearrangements reported for hexagonal perovskite derivatives Ba3M’M’’O8.5 are dictated by water absorption. The significant water uptake in Ba3M’M’’O8.5 (M’ = Nb; M’’= Mo, W) arises due to the flexibility of the crystal structure, whereby upon absorption of water, a fraction of the transition metal cations moves from the M1 site to the octahedral M2 site. The results presented here demonstrate that the presence of 50% V5+ on the M1 site, which has a strong preference for tetrahedral geometry, is enough to disrupt the flexibility of the cation sublattice resulting in the ordering of the cations exclusively on the M1 site and no significant water absorption.