General Information:
Chemical Formula:
Pb10AgBi5S18
Composition:
(Molecular Weight = 3,801.96 gm)
Silver 2.84 % Ag
Bismuth 27.48 % Bi
Lead 54.50 % Pb
Sulfur 15.18 % S
Empirical Formula:
Pb10AgBi5S18
IMA Status:
Approved IMA 1971
Name Origin:
Named after the Czech chemist, J. Heyrovsky (1890-1967).
Physical Properties:
Cleavage:
None
Color:
tin white.
Density:
7.18
Diaphaniety:
Opaque
Habits:
Acicular - Occurs as needle-like crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
4-5 - Fluorite-Apatite
Luster:
Metallic
Streak:
grayish black
More details...