Structural characterization of substituted calcium titanate compounds Ca1-xLaxTi1-xFexO3

The title compounds Ca1-xLaxTi1-xFexO3, 0,0 <= x <= 0.5 were prepared by solid state reaction All the prepared samples are perovskite orthorhombic space group Pbnm. The crystal structure has been refined by Rierveld method. It was found that the unit cell parameters are related to the ideal cubic perovskite and vary linearly with the cation substitution. The calculated values of the tolerance factor (t) for these compositions indicate a significant degree of distortion in the perovskite structure. The distortion decreases with increasing substitution level, maximum distortion corresponding to CaTiO3, which is consistent with the experimental results of cell distortion factor.