Natural Resources
The mineral form of potassium sulfate, arcanite, is relatively rare. Natural resources of potassium sulfate are minerals abundant in the Stassfurt salt. These are cocrystalisations of potassium sulfate and sulfates of magnesium calcium and sodium.
The minerals are:
- Kainite, MgSO4·KCl·H2O
- Schönite, K2SO4·MgSO4·6H2O
- Leonite, K2SO4·MgSO4·4H2O
- Langbeinite, K2SO4·2MgSO4
- Glaserite, K3Na(SO4)2
- Polyhalite, K2SO4·MgSO4·2CaSO4·2H2O
From some of the minerals like kainite, the potassium sulfate can be separated, because the corresponding salt is less soluble in water.
Kieserite, MgSO4·2H2O, can be combined with a solution of potassium chloride to produce potassium sulfate.
Read more about this topic: Potassium Sulfate
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