General Information:
Chemical Formula:Pb10AgBi5S18
Composition:(Molecular Weight = 3,801.96 gm)Silver 2.84 %
AgBismuth 27.48 %
BiLead 54.50 %
PbSulfur 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
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