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Friday, December 28, 2012

Anhydrite

                          

  • An anhydrous calcium sulfate, Mineral CaSO4 which is in the orthorhombic crystal form with three directions of cleavage parallel to the three planes of symmetry.
  • Anhydrite is found as a constituent of Evaporite deposits, typically associated with gypsum, alkali halides and carbonates. 
  • Naturally occurring anhydrite is a rare mineral since it readily transforms into gypsum when exposed to water. Reverse process is also possible, creating anhydrite by dehydrating gypsum.
  • By the year of 2017, the global market for gypsum and anhydrite is forecast to reach 211.6 million metric tons.

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