Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.76-5.03-9999
1
7.18
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Fracture
Conchoidal
-
Cleavage
None
None
Mohs Hardness
5.5-6.53-4
2
10
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Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite