Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
-99994.76-5.03
1
7.18
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Fracture
-
Conchoidal
Cleavage
None
None
Mohs Hardness
3-45.5-6.5
2
10
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Chemical Composition
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)