{{Short description|Solid substance containing one water molecule per two unit cells}} In [[chemistry]], a '''hemihydrate''' (or '''semihydrate''') is a [[hydrate]] whose solid contains one [[molecule]] of [[water of crystallization]] per two other molecules, or per two [[Crystal structure#Unit_cell|unit cell]]s. This is sometimes characterized as a solid that has one "half molecule" of water per unit cell.<ref>{{Cite book |last=Kent |first=James A. |url=https://books.google.com/books?id=zPZWYerB3SYC |title=Kent and Riegel's Handbook of Industrial Chemistry and Biotechnology |date=2007-10-08 |publisher=Springer Science & Business Media |isbn=978-0-387-27842-1 |pages=1096 |language=en}}</ref> An example of this is [[calcium sulfate hemihydrate]] ({{chem2|CaSO4*0.5H2O}} or {{chem2|2CaSO4*H2O}}), which is the hemihydrate of [[calcium sulfate]] ({{chem2|CaSO4}}).
==References== {{Reflist|2}}
[[Category:Hydrates]]
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