terms:gypsum
A naturally occurring crystalline form of hydrated calcium sulfate. Gypsum is a calcium dihydrate (CaSO4 • 2H2O) in the monoclinic crystalline form. At elevated temperatures the dihydrate in a dry environment may lose some of its water of crystallization to become the unstable hemihydrate (which will rehydrate when exposed to water). A monoclinic crystal of gypsum cannot become an orthorhombic crystal of anhydrite by simple dehydration. Compare anhydrite.
terms/gypsum.txt · Last modified: 2023/11/22 08:41 by 127.0.0.1