General Information:
Chemical Formula:
PbBi2S4
Composition:
(Molecular Weight = 753.42 gm)
Bismuth 55.47 % Bi
Lead 27.50 % Pb
Sulfur 17.02 % S
Empirical Formula:
PbBi2S4
Environment:
Vermland, Sweden.
Locality:
Nordmark,
Name Origin:
Named after its chemical composition.
Physical Properties:
Cleavage:
[110] Good
Color:
lead gray, gray, light gray, or tin white.
Density:
6.9 - 7.1, Average = 7
Diaphaniety:
Opaque
Habits:
Columnar - Forms columns, Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
gray black
More details...