Germanite

Germanite


Composition: Cu26Fe4Ge4S32
Crystal System : Cubic
Lustre : Metallic
Hardness : 4
Specific Gravity : 4.46-4.59
Year of Discovery: 1920
IMA Number: 1922
IMA Status: Grandfathered
Discovered By: Wilhelm Klein (Tsumeb mine captain)
Named for: Composition (the element germanium)
References:

Pufahl (1922)

Occurrence

  • Hypogene
  • 1st Oxidation Zone
  • 2nd Oxidation Zone
  • 3rd Oxidation Zone

Notable Finds

The first Ge mineral discovered at Tsumeb, as large, "pure" masses between depths of 140m and 180m. A second germanite zone occurred between 20 and 26 levels, with rare crystals of germanite to 5mm in cavities in the ore. A third zone was found deep in the third oxidation zone, (46 and 47 Levels) from which the largest recorded germanite crystal (a 30 mm tetrahedron) was recovered (Gebhard, 1999).