Mössbauer investigation of iron-aluminium mixed oxides.

Mixed hydroxides of iron and aluminium have been precipitated from solutions containing iron and aluminium salts. The ratio of iron and aluminium was changed from 1:1 to 1:9. The mixed oxides produced by heating the hydroxides have been investigated by the Mössbauer effect. The Mössbauer spectra were composed of two systems of lines: one is due to magnetic splitting produced by alpha-Fe(2)O(3), the other is due to quadrupole splitting (0.45 mm s ) which can be assigned to iron atoms in the lattice of alpha-Al(2)O(3). The role of the anion of the solvated salts has also been investigated.