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The growth of CuSO 4 crystals from a nonaqueous solvent, composed of (NH 4 ) 2 SO 4 and H 2 SO 4 is described. Solubility of CuSO 4 in solvents of varying (NH 4 ) 2 SO 4 to H 2 SO 4 ratio, at 200 °C, has been determined, as well as the temperature dependence of the solubility in 0.35(NH 4 ) 2 SO 4 - 0.65H 2 SO 4 . Single crystal specimens, weighing up to 150 mg have been obtained.

Crystallization of anhydrous copper sulfate from sulfuric acid - ammonium sulfate mixtures