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Difference between revisions of "Gypsum"

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==Description==
 
==Description==

Revision as of 09:29, 28 April 2016



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Description

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk and wallboard.

https://en.wikipedia.org/wiki/Gypsum