Crystal structure of Ce-doped CaMnO3 perovskite
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The synthesis and crystal structure of Ce-doped CaMnO3 perovskite has been investigated. Two powders with nominal compositions Ca0.5Ce0.5MnO3 and CaMn0.5Ce0.5O3 were prepared using a modified glycine/nitrate procedure. The possibility of incorporation of Ce ions in the positions A and B of the perovskite structure was investigated by X-ray methods. Influence of Cc on unit cell volume of the perovskite compounds, occupation numbers and distances between atoms were analyzed by Rietveld refinement. Microstructure size-strain analysis was performed, as well. The results revealed that Cc entered both positions A and B in the structure. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Keywords:X-ray methods / Perovskite
Source:Ceramics International, 2009, 35, 2, 787-790
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