Vaqqosova Mubinaxon Aqueous and anhydrous modification of calcium sulfate and gypsum technology

Vaqqosova Mubinaxon Aqueous and anhydrous modification of calcium sulfate and gypsum technology

Calcium sulfate is the inorganic compound with the formula CaSO4 and related hydrates. In the form of anhydrite , it is used as a desiccant. One particular hydrate is better known as plaster of another occurs naturally as the mineral gypsum.

• The anhydrous form of calcium sulfate

The anhydrous form of gypsum

Naturally occurring crystals are calcium sulfate dihydrate, CaSO4·2H2O, known as gypsum, and anhydrous calcium sulfate, II-CaSO4. When gypsum is heated, dehydration occurs to form hemihydrates, CaSO4·1/2H2O, followed by anhydrite, III-CaSO4.

At what temperature does gypsum become anhydrous? A method of producing anhydrous gypsum by heating and baking, at a temperature between 300 and 900°C,

It is used in medical practice to immobilize a broken limb. N. I. Pirogov was the first to propose it in 1854. It is used to straighten a crooked spine when bones are broken and joints are injured.