Explanation

gypsum is a kind of sulfate mineral containing water, and its chemical formula is CaSO4 · 2H2O. It belongs to the monoclinic system, usually in the form of plates or columns, with special cleavage characteristics. According to the different cleavage planes, gypsum crystal can present Gary twin, Paris twin and other forms. gypsum can take on different forms, including block, fiber, sheet or soil. The gypsum of fine block is called gypsum flower, and the fibrous aggregate is called fibrous gypsum. gypsum can be colorless or white, and transparent gypsum is called transparent gypsum. However, usually gypsum may be dyed light brown, yellow, gray and other colors by iron oxide, clay and organic matter. The hardness of gypsum is between 1.5 and 2 Mohs hardness. It is a relatively fragile mineral with a density of about 2.3 g/cm 3。 gypsum is mainly produced in salt lakes and is a typical product of chemical deposition. It can also form huge deposits in limestone, red shale, marl, sandstone or clay rock, together with anhydrite, halite and other minerals. In addition, gypsum can also be hydrated from anhydrite, or formed in the oxidation zone of vulcanization deposits and low-temperature hydrothermal vulcanization deposits. gypsum is widely used in many fields, including agriculture, construction, cement manufacturing, ceramics products, medical treatment, papermaking and chemical industry. It is used in the construction industry to prepare gypsum board, gypsum, gypsum, gypsum powder, cement admixtures, etc. In the medical field, gypsum is used to prepare gypsum bandages, while in the paper industry, it is used to treat wastewater and sediment in the paper making process.

Classification