jarosite

jarosite Chemische Eigenschaften,Einsatz,Produktion Methoden

• Physikalische Eigenschaften

  Habit: minute pseudocubic crystals or tabular, also granular, massive, earthy cryptocristalline crust and coatings.
  Color: ocherous, amber-yellow or dark brown.
  Diaphaneity: opaque.
  Luster: subadamantine to vitreous or resinous.
  Streak: pale yellow.
  Fracture: uneven to conchoidal.
  Cleavage: distinct (0001).
  Other: Pyroelectric.
  Chemical: insoluble in water but dissolves in HCl.
  Occurrence: widespread secondary mineral as encrustation and coating in the oxidizing zone of sulfidic ore deposits along with limonite and goethite. Forms from the aerobic alteration of pyrite.