Crystal structure of Ce-doped CaMnO3 perovskite

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 Ce 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 Ce entered both positions A and B in the structure.