Scotlandite


Composition: PbS4+O3
Crystal System : Monoclinic
Colours: White, pale-yellow
Lustre : Adamantine, pearly
Hardness (H) : <2
Specific Gravity (S.G) : 6.37
References: Gebhard (1999)

Distribution

Extremely rare. Third oxidation zone (43 Level).

Occurrence

  • Supergene
  • 3rd Oxidation Zone

Notable Finds

Scotlandite was found in the so-called "Lead Pocket" on 43 Level, in the third oxidation zone.

Paragenetic and General Notes

Scotlandite is the only sulphite mineral found at Tsumeb, its composition indicatiing formation under somewhat oxygen-defficient conditions. It occurs as pale-yellow chisel-shaped crystals to 1 mm in small vugs on the surface of hydrocerussite-altered cerussite crystals (Gebhard, 1999).  Litharge, massicot and minium are associated.