Jarosite
Chemical compound
>
Jarosite is a basic hydrous sulfate of potassium and ferric iron with a chemical formula of KFe₃(SO₄)₂(OH)₆. This sulfate mineral is formed in ore deposits by the oxidation of iron sulfides. Wikipedia
Formula mass: 500.8 g/mol
IMA symbol: Jrs
Solubility: Insoluble in water. Soluble in HCl
Cleavage: Distinct on
Color: Amber yellow or dark brown
Crystal class: Rhombohedral (3m); H-M symbol: (3m)
Crystal habit: Crystals are usually pseudocubic or tabular, also as granular crusts, nodules, fibrous masses or concretionary