What Is Gypsum Made Of?

Gypsum, common sulfate mineral of great commercial importance, composed of hydrated calcium sulfate (caso4·2h2o). In well-developed crystals the mineral commonly has been called selenite.

What Is Gypsum Made Of?

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk, and wallboard.

Gypsum is a common mineral, with thick and extensive evaporite beds in association with sedimentary rocks. Deposits are known to occur in strata from as far back as the Archaean eon.

Gypsum is deposited from lake and sea water, as well as in hot springs, from volcanic vapors, and sulfate solutions in veins.

Hydrothermal anhydrite in veins is commonly hydrated to gypsum by groundwater in nearsurface exposures. Gypsum is insoluble in water, but can be dissolved by sulfuric acid.

Gypsum is mostly used in plaster, wallboard, and cement. It is also used as a soil conditioner.

The word gypsum is derived from the Greek word γύψος (gypsos),plaster“. Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum

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