Epsomite

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Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O.

Epsomite crystallizes in the orthorhombic system as rarely found acicular or fibrous crystals, the normal form is as massive encrustations. It is colorless to white with tints of yellow, green and pink. The Mohs hardness is 2 to 2.5 and it has a low specific gravity of 1.67.

It is readily soluble in water. It absorbs water from the air and converts to hexahydrate with the loss of one water molecule and a switch to monoclinic structure.
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  • Hexahidrit, epsomit

    Hexahidrit, epsomit

    Fehér, földes tömeg

    Object information
    Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA

  • Epsomit, hexahidrit

    Epsomit, hexahidrit

    Fehér, porszerű

    Object information
    Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA

  • Epsomit

    Epsomit

    Mai neve: epsomit, Lelőhely:...

    Object information
    Image: Viski Károly Múzeum Kalocsa - RR-F

  • Schauglas mit Bittersalz-Granulat (Epsomit)

    Schauglas mit Bittersalz-Granulat (Epsomit)

    Bittersalz bzw. Epsomit wird...

    Object information
    Image: Werra-Kalibergbau-Museum, Heringen/W. - CC BY-NC-SA

  • Einspeicherungsredler der Bittersalzstation Merkers

    Einspeicherungsredler der Bittersalzstation Merkers

    Redler oder...

    Object information
    Image: Werra-Kalibergbau-Museum, Heringen/W. - CC BY-NC-SA

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