Microstructural characterization and phase analysis of new pyrochlore-type mixed metal oxides RESmTi2O7 (RE = Gd, Er) by X-ray powder diffraction using Rietveld refinement method and spectroscopic studies

Two new RESmTi2O7 mixed metal oxides were prepared by mixing Sm2O3, RE2O3 (RE = Gd, Er) and TiO2 using a modified solid state method which gives the target pyrochlores with excellent phase purity. SmGdTi2O7 and SmErTi2O7 samples were characterized using PXRD, SEM, EDS, FT-IR and Raman spectroscopy. Rietveld refinement was employed to obtain crystallographic parameters using MAUD software. The qualitative phase analysis showed that the mixed …