Chalcophyllite


Composition: Cu9Al[(OH)12(SO4)1.5(AsO4)2].18H2O
Crystal System : Trigonal
Colours: Grey-green (Maucher, 1908)
Lustre : Sub-adamantine, Vitreous, Pearly
Hardness (H) : 2
Specific Gravity (S.G) : 2.67-2.69
References: Maucher (1908)

Distribution

Extremely rare. High in the first oxidation zone. Questionable status at Tsumeb.

Occurrence

  • Supergene
  • 1st Oxidation Zone

Paragenetic and General Notes

Noted by Maucher (1908) but not observed since.