Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.6-5.763.05-3.08
1
7.18
👆🏻
Fracture
Uneven
Uneven, Irregular, Conchoidal
Cleavage
[001] perfect; [100] distinct
None
Mohs Hardness
2.5-36.5
2
10
👆🏻
Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)