Formation of molybdenum-bearing ferrites, Fe3 –xMoxO4(x= 0.04–0.19), in aqueous suspension by air oxidation

Abstract

Molybdenum-bearing ferrites (Mo : Fe_tot., mol ratios 0.015–0.069 : 1) have been formed by air oxidation of iron(II) hydroxide suspensions, which were prepared in the presence of Mo^III ions, at Mo : Fe_tot. mol ratios of 0.032–0.326 : 1 in the initial suspensions, at pH 9.0 and 65 °C. Lattice constants of the Mo-bearing ferrites, Fe_{3 –x}Mo_xO₄, were found to increase linearly with increasing values of x. This relationship agrees with that of stoicheiometric Mo-bearing ferrites.