what is gypsum and P.O.P and their uses??
Answers
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. A massive fine-grained white or lightly tinted variety of gypsum, called alabaster, has been used for sculpture by many cultures including Ancient Egypt, Mesopotamia, Ancient Rome, the Byzantine Empire and the Nottingham alabasters of Medieval England. Gypsum also crystallizes as beautiful translucent crystals of selenite (mineral). It also forms as an evaporite mineral and as a hydration product of anhydrite.
P.O.P. stands for Plaster of paris which is Calcium Sulfate hemi-hydrate and is used for decoration whereas Gypsum is Calcium Sulfate dihydrate..........Gypsum gets converted to Plaster of Paris when it is heated at 373k.
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