Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.6-3.32.9-3.5
1
7.18
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Fracture
Lamellar
Conchoidal
Cleavage
Perfect 001
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
2-2.55.5-6
2
10
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Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)