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    The hydration of calcium sulphate hemihydrate (CaSO4·0.5H2O) leading to the crystallization of gypsum (calcium sulphate dihydrate – CaSO4·2H2O) has been.

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    Calcium Sulfate Dihydrate = CaSO4 • (2) H2O (Gypsum) Calcium Sulfate Hemihydrate = CaSO4 • (½) H2O (Impression Plaster, Model Plaster, Cast Stone,.

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  • Effect of high temperatures on gypsum paste and . - AIP Publishing

    Gypsum has been used for about 7 000 years and its fire resistance has been known for . Used gypsum (sulfate hemihydrate) was commercial product made by.

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