Collect. Czech. Chem. Commun.
1984, 49, 2478-2484
https://doi.org/10.1135/cccc19842478
Preparation of α-Fe2O3 (hematite) by oxidation precipitation of aqueous solutions of iron(II) sulphate
Jan Šubrt, Alexandra Šolcová, František Hanousek, Antonín Petřina and Vladimír Zapletal
Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 250 68 Řež
Abstract
The oxidation precipitation of aqueous solutions of iron(II) sulphate by oxygen gas was studied; the effect of pH, temperature, and presence of α-FeOOH and α-Fe2O3 crystal nuclei was examined and the conditions for the preparation of phase-pure α-Fe2O3 (hematite) were sought. The hematite prepared contained 3-5% structurally bonded water. The effect of the bonded water on the properties of the product is described and the way of the bonding in the structure is discussed.
