Explanatory notes
… of pulverised coal, sodium and gaseous ammonia. White powder, plates or paste, crystalline, hygroscopic, very … (3) Calcium cyanide (Ca(CN) 2 ). White or greyish powder according to its degree of purity, soluble in water. … Nickel cyanide (Ni(CN) 2 ). Hydrated, greenish plates or powder; amorphous, a yellow powder. Used in metallurgy and …