Structural observations on La2(Ni,Co)O4±δ phases determined from in situ neutron powder diffraction
| Autor: | Stephen J. Skinner, Gisele Amow |
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| Rok vydání: | 2007 |
| Předmět: |
Valence (chemistry)
Chemistry Neutron diffraction Analytical chemistry Conductivity Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry Bond length Crystallography Transition metal Materials Chemistry Ceramics and Composites Ionic conductivity Physical and Theoretical Chemistry Solid solution |
| Zdroj: | Journal of Solid State Chemistry. 180:1977-1983 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2007.04.020 |
| Popis: | In situ neutron powder diffraction data have been analysed for a number of compositions in the solid solution series La 2 Ni 1− x Co x O 4± δ over the temperature range 150–650 °C. High-quality Rietveld refinements indicate no major structural transitions have occurred in any of the compositions, although close examination of the Ni/Co O bond distances highlight changes in the coordination environment with increasing temperature. Further, the changes in the coordination can be correlated to changes in both the oxide ion and electronic conductivity indicating a direct link between transport properties, bonding and transition metal valence state in these Co containing layered perovskites. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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