pentahydrite

noun

pen·​ta·​hy·​drite

ˌpentəˈhīˌdrīt

plural -s

: a mineral MgSO₄.5H₂O consisting of hydrous sulfate of magnesium isostructural with chalcanthite and containing less water than epsomite

Word History

Etymology

penta- + hydr- + -ite

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