What is "leonite"

n. (context mineralogy English) A saline evaporite, consisting of a mixed potassium and magnesium sulphate, with the chemical formula (potassium₂sulfuroxygen₄)(magnesiumsulfuroxygen₄)

Leonite is a hydrated double sulfate of magnesium and potassium. It has the formula KSO·MgSO·4HO. The mineral was named after Leo Strippelmann, who was director of the salt works at Westeregeln in Germany. The mineral is part of the blodite group of hydrated double sulfate minerals.