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pentahydrite

noun pen·ta·hy·drite \ ˌpentəˈhīˌdrīt \
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Definition of pentahydrite

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

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Origin and Etymology of pentahydrite

penta- + hydr- + -ite

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