Mineralogy Database

Epsomite Mineral Data

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General Epsomite Information

Help on Chemical  Formula: Chemical Formula: MgSO4•7(H2O)
Help on Composition: Composition: Molecular Weight = 246.48 gm
   Magnesium   9.86 %  Mg   16.35 % MgO
   Hydrogen    5.73 %  H    51.16 % H2O
   Sulfur     13.01 %  S    32.48 % SO3
   Oxygen     71.40 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(SO4)•7(H2O)
Help on Environment: Environment: White efflorescence on cave walls, volcanic exhalations, or deposited by Mg sulfate spring waters.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1824
Help on Locality: Locality: Lake-bed deposits on Kruger Mountain, Oregon. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The mineral has long been known from the deposits associated with the mineral waters at Epsom, Surrey, England.
Help on Name Pronunciation: Name Pronunciation: Epsomite Say EPSOMITE
Help on Synonym: Synonym: Bitter Salt
  Epsom Salts
  ICSD 29384
  PDF 36-419
  Reichardite - massive