1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Nearly insoluble in HCl and HNO3
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle
Conchoidal, Brittle
1.6 Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
Distinct on {010}
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Not Available