Gypsum Is often a comfortable sulfate mineral made up of calcium sulfate dihydrate, Along with the chemical method CaSO4·2H2O.[four] It truly is widely mined which is applied being a fertilizer and because the principal constituent in lots of varieties of plaster, drywall and blackboard or sidewalk chalk. Calcination: The rock https://www.propanraya.com/id/produk/eco-gypsum-ee-4050
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