Why Gypsum is heated with beyond 373K
Answers
Answer:
Gypsum is a soft sulphate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSo₄.2H₂O.
When gypsum is heated at 373 K Plaster of Paris (P.O.P) is formed. This is used in building materials and construction projects work.
Heating beyond 180 degree Celsius it gives a product called gamma anhydrite. The widespread, singular use of gamma ray - neutron surveys has resulted in general misconception regarding the occurrence of porosity … Anhydrite and gypsum may produce porosity errors when average velocity or density information is used with the sonic or density logs.
Beyond 250 degree Celsius it produces beta anhydrite … A structural model for beta-CaSO4 center dot 0.5H(2)O is proposed on the basis of SR-PXD data and a trigonal unit cell (in … setting) a = 6.93145(3), c = 12.736 17(4) angstrom, Z = 6, and space group P3(1). A structural model for soluble anhydrite. This beta anhydrite doesn't react with water, it helps in making gypsum an oxidizing agent at high temperature
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Answer:
When gypsum is heated at 373 K, it loses its water of crystallization or all the water molecules and becomes calcium sulphate hemihydrate. Gypsum is converted to “Plaster of Paris”.On being further heated beyond 373 K, gypsum gives a product known as Gamma “Anhydrite”.