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Encyclopedia > Epsomite

Epsomite is a mineral.


It is made of magnesium sulfate. Magnesium sulfate (commonly called Epsom salts or bitter salts in hydrated form) is a chemical compound with the formula MgSO4·7H2O. Origin Epsom salt was originally prepared by boiling down mineral waters at Epsom, England and afterwards prepared from sea water. ...


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EPSOMITE (Hydrated Magnesium Sulfate) (484 words)
Epsomite, or heptahydrite as it is known in chemistry circles, is one of only a few water soluble sulfate minerals.
Epsomite forms from as an efflorescent (a precipitation from vapors), on limestone cave walls and on the walls and timbers of various mines.
This is seen in the change of symmetry from orthorhombic in epsomite to monoclinic in hexahydrite.
Method for recovering magnesium sulfate products from mixtures of epsomite and halite - Patent 5281242 (4232 words)
The method generally involves heating a mixture of epsomite and halite to form clusters of lower hydrated magnesium sulfate crystals and subsequently applying slight pressure to the clusters so that they collapse to yield fine, less hydrated magnesium sulfate crystals which can then be easily separated from the comparatively coarse halite crystals.
Heating at this temperature causes the epsomite crystals to break down into clusters formed of a plurality of fine crystals of magnesium sulfate hexahydrate or of lower hydrates of magnesium sulfate, which remain clumped together such that the clusters typically maintain the shape of the original epsomite crystals.
Epsomite obtained from Example 4, of about 0.02% sodium chloride was dissolved with water and recrystallized under vacuum to provide a slurry of epsomite.
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