General Information:
Chemical Formula:
Pb7(Cu,Ag)2Bi6S17
Composition:
(Molecular Weight = 3,398.66 gm)
Copper 2.80 % Cu
Silver 1.59 % Ag
Bismuth 36.89 % Bi
Lead 42.68 % Pb
Sulfur 16.04 % S
Empirical Formula:
Pb7Cu1.5Ag0.5Bi6S17
IMA Status:
Approved IMA 1969
Physical Properties:
Cleavage:
None
Color:
lead gray, gray blue, yellow blue, or silver gray.
Density:
7.02
Diaphaniety:
Opaque
Hardness:
2.5 - Finger Nail
Luster:
Metallic
Streak:
gray
More details...