Vanthoffite

vanthoffite

lodite

langbeinite

loweite

Images

Formula: Na₆Mg(SO₄)₄
Anhydrous normal sulphate
Crystal System: Monoclinic
Specific gravity: 2.694 measured, 2.687 calculated
Hardness: 3½
Streak: White
Colour: Colourless, grey, pale yellow, colourless in transmitted light
Solubility: Soluble in water, slightly bitter taste
Environments

Evaporite deposits

Vanthoffite is a marine evaporite mineral (Webmin).

Localities

At the Salt mine, Hall valley, Hall, Innsbruck-Land District, Tyrol, Austria, vanthoffite is associated with blödite (HOM).

At the type locality, Wilhelmshall, Halberstadt, Harz, Saxony-Anhalt, Germany, vanthoffite occurs in evaporite deposits asssociated with langbeinite and halite (Mindat).

At the Berlepsch mine, Stassfurt, Stassfurt Potash deposit, Saxony-Anhalt, Germany, vanthoffite is associated with löweite, langbeinite and halite (HOM).

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