Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.9-3.53.10-3.20
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
Poor to good on (001)
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
(Mg,Fe) 5(SiO 4) 2(F,OH) 2Ulrich Henn and Claudio C.