jarosite definition

  • noun:
    • A mineral with rhombohedral crystals, KFe33+(SO4)2(OH)6.
    • An ocher-yellow mineral happening in min rhombohedral crystals. Its a hydrous sulphate of iron and potash.
    • A native hydrous sulphate of metal and potassium, occurring in ocher-yellow rhombohedral crystals, and in granular masses.
    • types of this mineral in which the potassium is replaced by salt and also by lead have already been called natrojarosite and plumbojarosite respectively.

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