anhydrite
[an-hahy-drahyt]
- a mineral, anhydrous calcium sulfate, CaSO4, usually occurring in whitish or slightly colored masses.
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Origin of anhydrite
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
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Anhydrite, anhydrous sulphate of calcium, a mineral presenting several varieties of structure and colour.
These observations appear to show that the change to anhydrite is a very gradual process at temperatures below a red heat.
Anhydrite (CaSO4) also occurs in rock masses, and is often associated with rock salt.
A Textbook of Assaying: For the Use of Those Connected with Mines.Cornelius Beringer and John Jacob Beringer
Conversely gypsum may, under certain conditions, be dehydrated or reduced to anhydrite.
anhydrite
- a colourless or greyish-white mineral, found in sedimentary rocks. It is used in the manufacture of cement, fertilizers, and chemicals. Composition: anhydrous calcium sulphate. Formula: CaSO 4 . Crystal structure: orthorhombic
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Word Origin
C19: from anhydr (ous) + -ite 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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