General Information:
Chemical Formula:
Pb9Sb22S42
Composition:
(Molecular Weight = 5,890.07 gm)
Antimony 45.47 % Sb
Lead 31.66 % Pb
Sulfur 22.87 % S
Empirical Formula:
Pb9Sb22S42
Name Origin:
Named after the mineralogist, J. K. L. Zincken (1798-1862).
Physical Properties:
Cleavage:
[1120] Imperfect
Color:
gray or steel gray.
Density:
5.12 - 5.35, Average = 5.23
Diaphaniety:
Opaque
Habits:
Acicular - Occurs as needle-like crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Striated - Parallel lines on crystal surface or cleavage face.
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
None.
Luster:
Metallic
Streak:
steel gray
More details...