STRUCTURAL STUDIES OF BINARY IRON VANADATE GLASS

Structural studies of iron vanadate glasses were carried out using dif ferential thermal analysis, infrared (IR) and Mossbauer spectroscopy. Glasses with cross-linking density higher than the vitreous V2O5 were obtained by introducing Fe2O3 in the V2O5 matrix. Mossbauer spectra ar e consistent with an interpretation in which iron ions exist as Fe3+ w ith tetrahedral coordination in the glass compositions. IR spectra ind icate that Fe3+ ions occupy substitutional positions in all glass comp ositions, without affecting the V=O bond vibration.