Lattice effects in cubic La{sub 2}Mo{sub 2}O{sub 9}: Effect of vacuum and correlation with transport properties
- Dipartimento di Chimica Fisica 'M.Rolla', Universita di Pavia, Viale Taramelli 16, 27100 Pavia (Italy)
- Institute Laue-Langevin, Boite Postale 156, F-38042 Grenoble (France)
- Dipartimento di Chimica e Chimica Industriale, Universita di Genova, Via Dodecaneso 31, 16146 Genova (Italy)
This study aims to investigate correlations between lattice effects and transport properties in cubic La{sub 2}Mo{sub 2}O{sub 9}. High temperature neutron diffraction data, recorded in air and under vacuum, are used to follow the evolution with temperature of selected structural parameters, i.e. bond lengths and angles. Results suggest a possible correlation with the experimentally observed decrease of the activation energy for oxygen migration at high temperature. The effect on the structural properties of the low oxygen partial pressure used during the measurements in vacuum is negligible and this represents a valuable information in view of possible applications of the material in solid state devices. - Graphical abstract: Anti-tetrahedral unit centred in O1 and linked through La ions to form a cage where the partially occupied O2 and O3 ions are placed.
- OSTI ID:
- 21043930
- Journal Information:
- Journal of Solid State Chemistry, Vol. 181, Issue 3; Other Information: DOI: 10.1016/j.jssc.2008.01.001; PII: S0022-4596(08)00008-X; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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