Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.6-5.762.34-2.51
1
7.18
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Fracture
Uneven
-
Cleavage
[001] perfect; [100] distinct
None
Mohs Hardness
2.5-3-9999
2
10
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Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O