General Information:
Chemical Formula:PbBi2S4
Composition:(Molecular Weight = 753.42 gm)Bismuth 55.47 %
BiLead 27.50 %
PbSulfur 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
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