Chromia (Cr2O3)/alumina (Al2O3) solid solution (ss) powders have been prepared by the hydrazine method. As-prepared powders are classified into three groups : (i) amorphous below 25 mol% Al2O3, (ii) mixtures of this and AlO(OH) gel(ss) between 25 and 80 mol% Al2O3, and (iii) AlO(OH) gel(ss) above 80 mol% Al2O3. Cr2O3 solid solutions crystallize at low temperatures from amorphous materials. The formation process leading to continuous series of solid solutions is examined. Cr2O3 (ss) powders prepared at a composition of Cr2O3/Al2O3 = 80/20 mol% have been characterized for particle size and shape. Individual particles tend toward a hexagonal morphology above 900 degrees C.