Mineralogy of Gypsum : Mineral gypsum is the most common of the naturally occurring sulphate minerals.
It is a dehydrate calcium sulphate (CaSo4. 2H2o) with a composition of 70% calcium sulphate and 21% water.
Anhydrite (CaSo4) is also a naturally occurring sulphate mineral with no water of crystallization.
Pure gypsum contains Cao 32.6%,So3 46.5%, and H2o 20.9%. Mineral gypsum and anhydrite are frequently found in close association and it is seldom that a natural calcium sulphate deposit will consist exclusively of one mineral or the other. These are common evaporate minerals. Gypsum tends to be of greater economic importance because of its chemical properties.
Uses of Gypsum : Gypsum is one of the important industrial minerals having multiple uses. It can be used either in uncalcined (natural) form or calcined form. Uncalcined gypsum is mostly used in the manufacture of cement and fertilizer and as a soil conditioner in the naturalization of alkaline soils and manufacture of sulphric acid and also as filler in paint, rubber, paper, etc. Calcined form of gypsum is utilized in the preparation of various type of building materials such as plasters, wallboards, blocks, etc.Download SGS Test Report