Mineralogy Database

Pentahydrite Mineral Data

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General Pentahydrite Information

Help on Chemical  Formula: Chemical Formula: MgSO4•5(H2O)
Help on Composition: Composition: Molecular Weight = 210.45 gm
   Magnesium  11.55 %  Mg   19.15 % MgO
   Hydrogen    4.79 %  H    42.80 % H2O
   Sulfur     15.24 %  S    38.05 % SO3
   Oxygen     68.42 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(SO4)•5(H2O)
Help on Environment: Environment: Pseudomorphs of dehydration of epsomite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1951
Help on Locality: Locality: The Geysers, Sonoma County, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek, penta, "five" and hydros "water" in allusion to the 5 water molecules in the formula.
Help on Name Pronunciation: Name Pronunciation: Pentahydrite + Pronunciation Say PENTAHYDRITE
Help on Synonym: Synonym: ICSD 2776
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