General Information:
Chemical Formula:PbS
Composition:(Molecular Weight = 239.27 gm)Lead 86.60 %
PbSulfur 13.40 %
S Empirical Formula: PbS
Environment:Lead sulfide ore veins, and disseminated in igneous and sedimentary rocks.
Locality:Joplin district of Missouri, Kansas, and Oklahoma and other world wide occurrences.
Name Origin:The Roman naturalist, Pliny, used the name galena to describe lead ore.
Physical Properties: Cleavage:[001] Perfect, [010] Perfect, [100] Perfect
Color:light lead gray or dark lead gray.
Density:7.2 - 7.6, Average = 7.4
Diaphaniety:Opaque
Habits:Euhedral Crystals - Occurs as well-formed crystals showing good external form., Massive - Granular - Common texture observed in granite and other igneous rock., Massive - Uniformly in distinguishable crystals forming large m
Hardness:2.5 - Finger Nail
Luminescence:None.
Luster:Metallic
Streak:grayish black
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