Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.28-4.42-9999
1
7.18
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Fracture
Conchoidal
-
Cleavage
Distinct on [010] and [100] poor on [101]
None
Mohs Hardness
5-5.53-4
2
10
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Chemical Composition
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite