Cobalt Antimonate, CoSb₂O₆

Cobalt Antimonate, CoSb₂O₆.5H₂O, is obtained by precipitating cobalt acetate with a solution of antimonic acid. The precipitate is rose-coloured, becoming red on drying. When dried over sulphuric acid it loses three molecules of water, yielding the dihydrate, CoSb₂O₆.2H₂O, which at about 300° C. becomes anhydrous.