Cadmium Carbonate is a white, odorless crystal or powder. It is a naturally occuring mineral (known as Otavite). Cadmium ... Carbonate Cadmium Carbonate is a white, odorless crystal or powder. It is a naturally occuring mineral (known as Otavite), Which ... , soluble in acids, KCN,NH, salts. Appearance and Odor : White, amorphous powder, no odor.