Jewur and Kuriacose  performed a systematic study of the thermal decomposition of ferric acetate that shows it decomposes to the hematite phase with activation energy of 94.98 kJ/mol.
This value is close to the one obtained by Jewur and [Kuriacose.sup.7] for the ferric acetate ([E.sub.a] = 94,98 kJ/mol).
In this paper, we report on a bentonite/iron oxide sample series obtained by isothermal calcination of powder composed of bentonite and ferric acetate
. The proposed technique enables to prepare directly the composite material of iron oxide particles embedded in a bentonite matrix preventing the particles from aggregation.