Cubic beta-Fe2O3 as the product of the thermal decomposition of Fe2(SO4)3 (original) (raw)

Hyperfine Interactions, 1999

Abstract

The thermal decomposition of Fe2(SO4)3 in air has been investigated using transmission Mössbauer spectroscopy, CEMS and X-ray powder diffraction. The hexagonal alpha-Fe2O3 and cubic beta-Fe2O3 with spinel structure have been identified as products of the decomposition. The influence of the Fe2(SO4)3 particle size on the yield of beta-Fe2O3 in the final product is pointed out and discussed. The size of particles and the calcination temperature are the most important kinetic factors determining the phase composition (beta-Fe2O3/alpha-Fe2O3) of iron (III) oxide.

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