ZINCI CARBONAS PRAECIPITATUS—PRECIPITATED ZINC CARBONATE
Derivation.—Solutions of nearly equal weight of sodium carbonate and zinc sulphate are boiled together; dry precipitate. This salt is in reality a mixture of zinc carbonate and oxide, in varying proportions, with water of crystallization.
Properties.—An impalpable white powder, of somewhat variable chemical composition, without odor or taste; insoluble in water or alcohol.