Geology and Minerals
Calcium sulfate
Calcium sulfate (or calcium sulphate) is an inorganic salt with the chemical formula CaSO4. It occurs in several hydrated forms; the anhydrous state (known as anhydrite) is a white crystalline solid often found in evaporite deposits. Its dihydrate form is the mineral gypsum, which may be dehydrated to produce bassanite, the hemihydrate state. Gypsum occurs in nature as crystals (selenite) or fibrous masses (satin spar), typically colorless to white, though impurities can impart other hues. All forms of calcium sulfate are sparingly soluble in water and cause permanent hardness when dissolved therein.
Also on this shelf
Kangaroo Island.
Ashfield Shale.
See also
- ▸Geology of the Palatinate Forest
- ▸Adoration of the Magi (Botticelli)
- ▸Cistecephalus Assemblage Zone
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