A mineral of a white or a slightly bluish color, usually massive. It is anhydrous sulphate of lime, and differs from gypsum in not containing water (whence the name).
A mineral consisting of anhydrous calcium sulfate, CaSO4. It is essentially the mineral gypsum without its water of crystallization, and it alters readily to gypsum.
a sulfate mineral with the chemical formula of CaSO4
A specific calcined gypsum rock whose chemical composition is anhydrous calcium sulfate (CaSO4). It is used in Portland Cement to control set.
The common name for the naturally occurring calcium sulphate. Anhydrite is calcium sulphate (CaSO4 ) existing in the orthorhombic crystalline form. The anhydrite crystal cannot become a gypsum crystal (monoclinic form) in a single hydration step. Anhydrite must first become dissociated in solution before it can crystallize as gypsum (or recrystallize as anhydrite). Compare gypsum.
Translucent or transparent mineral with pearly luster. White, grey or reddish. (3 - 3.5)
Anhydrous (does not contain water) calcium sulfate, similar to gypsum but harder and slightly less soluble.
Anhydrite is a mineral - anhydrous calcium sulfate, CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the orthorhombic barium (barite) and strontium (celestine) sulfates, as might be expected from the chemical formulas.
