Solid State Ionics, Vol.303, 132-137, 2017
Structure evolution in the LaMn1-xFexO3+delta system by Rietveld analysis
The synthesis of LaMn1 - xFexO3 + delta (0 <= x <= 1)solid solutions perovskite powder was carried out using high-energy milling from the constituent oxides, and further crystallization by high temperature treatment. The compositions of the crystalline phases as a function of x were determined by X-ray powder diffraction using a Rietveld refinement. The relationship between composition and structure was covered. This showed that LaMn1 - xFexO3 + delta exists with the rhombohedral structure (R-3c, 167) only below x = 0.3 and with the orthorhombic structure (Pnma, 62) over x = 0.7. The rhombohedral phase coexists with the orthorhombic phase between 0.4