Gypsum is a monoclinic mineral, and its main chemical component is calcium sulfate (CaSO4). Gypsum is a widely used industrial and construction material. It can be used for cement retarder, gypsum building products, model making, medical food additives, sulfuric acid production, paper filler, paint filler, etc.
The microporous structure and heating dehydration of gypsum, can make it have excellent sound insulation, heat insulation and fire performance.
Gypsum is commonly referred as gypsum and anhydrite two minerals. The raw gypsum is calcium sulfate dihydrate (Ca [SO4] ·2H2O), also known as dihydrate gypsum, hydrogypsum or anhydrite. The theoretical components are CaO32.6%, SO346.5%, H2O 20.9%, monoclinic crystal system. Anhydrite is anhydrous calcium sulfate (Ca [SO4]), its theoretical components are CaO41.2% and SO35.8%. The two kinds of gypsum are often produced together and can be transformed into each other under certain geological processes.
