Kremersite

Kremersite is a rare mineral which is a hydrated multiple chloride of iron, ammonium and potassium with the formula: (NH₄,K)₂FeCl₅·H₂O. Kremersite is a brown-red to orange mineral that crystallizes in the orthorhombic system. It is a water soluble mineral that is found around volcanic fumaroles. Occurs at Vesuvius, Italy and Mt. Etna, Sicily. It was discovered in 1853 and named for the German chemist, Peter Kremers (1827-?).

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See also

List of minerals K-M (complete)