anhydrite

/an-hahy-drahyt/US // ænˈhaɪ draɪt //UK // (ænˈhaɪdraɪt) //

无水石膏,无水石,无水石膏矿,无水石粉

Definitions

n.名词 noun

1
- : a mineral, anhydrous calcium sulfate, CaSO4, usually occurring in whitish or slightly colored masses.

Anhydrite (CaSO4) also occurs in rock masses, and is often associated with rock salt.
Conversely gypsum may, under certain conditions, be dehydrated or reduced to anhydrite.
These observations appear to show that the change to anhydrite is a very gradual process at temperatures below a red heat.
This presence of salt-laden anhydrite and the occasional sulphur springs with high temperatures are extremely interesting.
Anhydrite, anhydrous sulphate of calcium, a mineral presenting several varieties of structure and colour.