Germanite

Schaurteite and Germanite Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, Africa Size: 5.3 x 3 x 3 cm (Small Cabinet) Owner: Kristalle and Crystal Classics
Chemical Formula: Cu26Fe4Ge4S32
Locality: Tsumeb mine (Tsumcorp mine), Tsumeb, Otavi, Namibia
Name Origin: Named after its content of the element Germanium.Germanite is a rare copper iron germanium sulfide mineral, Cu26Fe4Ge4S32. It was first discovered in 1922, and named for its germanium content. It is only a minor source of this important semiconductor element, which is mainly derived from the processing of the zinc sulfide mineral sphalerite.

Germanite contains gallium, zinc, molybdenum, arsenic, and vanadium as impurities.Its type locality is the Tsumeb Mine in Namibia where it occurs in a hydrothermal polymetallic ore deposit in dolostone in association with renierite, pyrite, tennantite, enargite, galena, sphalerite, digenite, bornite and chalcopyrite. It has also been reported from Argentina, Armenia, Bulgaria, Cuba, Democratic Republic of Congo (Zaire), Finland, France, Greece, Japan, Republic of Congo (Brazzaville), Russia and the United States.

Physical Properties

Cleavage: None
Color: Brown, Red gray.
Density: 4.4 – 4.6, Average = 4.5
Diaphaneity: Opaque
Fracture: Brittle – Generally displayed by glasses and most non-metallic minerals.
Hardness: 3 – Calcite
Luster: Metallic
Streak: dark gray

Photos :

GERMANITE Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, Africa Size: 5.5 x 4 x 2.5 cm (Small Cabinet) Owner: Kristalle and Crystal Classics
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia © 2002 Thames Valley Minerals
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