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Calcium sulfate hemihydrate react with water

CaSO4•0.5H2O + 1.5H2O → CaSO4•2H2O

Calcium sulfate hemihydrate react with water to produce calcium sulfate dihydrate.

In contrast to most minerals, which when rehydrated simply form liquid or semi-liquid pastes, or remain powdery, calcined gypsum has an unusual property: when mixed with water at normal (ambient) temperatures, it quickly reverts chemically to the preferred dihydrate form, while physically "setting" to form a rigid and relatively strong gypsum crystal lattice.

Picture of reaction: img1 BB html

Сoding to search: CaSO4 • 0.5H2O + 1.5 H2O = CaSO4 • 2H2O

Key words: CaSO4•0.5H2O, CaSO4•2H2O, h2o

Add / Edited: 27.09.2015 /

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