Physical Properties
Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.6-5.763.35
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
[001] perfect; [100] distinct
None
Mohs Hardness
2.5-35.5
2
10
👆🏻
Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
(Mg,Fe) 2Si 2O 6Ulrich Henn and Claudio C.