General Information:
Chemical Formula:
Pb13CuSb7S24
Composition:
(Molecular Weight = 4,378.98 gm)
Copper 1.45 % Cu
Antimony 19.46 % Sb
Lead 61.51 % Pb
Sulfur 17.57 % S
Empirical Formula:
Pb13CuSb7S24
Locality:
Marble Lake, Barrie Township, Frontenac Co. Ontario, Canada.
Physical Properties:
Cleavage:
[010] Perfect
Color:
blackish gray or lead gray.
Density:
6.34 - 6.43, Average = 6.38
Diaphaniety:
Opaque
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Acicular - Occurs as needle-like crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
metallic
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