Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
-99995.6-5.76
1
7.18
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Fracture
-
Uneven
Cleavage
None
[001] perfect; [100] distinct
Mohs Hardness
3-42.5-3
2
10
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Chemical Composition
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)