Germanite
Mineral Cu13Fe2Ge2S16
About it
Pinkish grey copper-germanium sulfide, almost always massive; once a germanium ore at Tsumeb, Namibia, and Kipushi in the Democratic Republic of the Congo.
- Type
- Mineral
- Group
- Sulfide, germanite group
- Formula
- Cu13Fe2Ge2S16
- Hardness (Mohs)
- 4
- Specific gravity
- 4.4–4.6
- Streak
- dark grey to black
- Lustre
- metallic
- Crystal system
- Isometric (cubic)
- Colours
- pinkish grey, dull brown tarnish
- Transparency
- opaque
- Cleavage and fracture
- none; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.