The cation distribution in CoFe2O4

The metal ions in CoFe2O4 when fired in air are probably randomly distributed over the cation sites of the spinel structure. The parameters (u is the coordinate of the O ions and l is the fraction of the tetrahedral sites occupied by Fe ions) of CoFe2O4 samples are: for a firing temp. of 1350 Deg and quenched in air, a = 8.387 A., u = 0.375, l = 0.65; for a firing temp. of 1350 Deg and slowly cooled in air, a = 8.393 A., u = 0.375, l = 0.63. Essentially the same results were obtained for firing temps. of 1200 and 1400 Deg