General Information:
Chemical Formula:
PbGe4O9
Composition:
(Molecular Weight = 641.63 gm)
Germanium 45.27 % Ge
Lead 32.29 % Pb
Oxygen 22.44 % O
Empirical Formula:
PbGe4O9
Environment:
With other Ge-bearing minerals.
IMA Status:
Approved IMA
Locality:
Tsumeb mine, Namibia.
Name Origin:
Named for the Herrero tribe name of the locality, Tsumeb.
Physical Properties:
Cleavage:
[???] Indistinct
Color:
colorless or white.
Diaphaniety:
Translucent
Habits:
Pseudo Hexagonal - Crystals show a hexagonal outline., ,
Hardness:
3 - Calcite
Luster:
Subadamantine
Streak:
white
More details...