Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.82-4.002.9-3.5
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
{???} Indistinct
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
5.55.5-6
2
10
👆🏻
Chemical Composition
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)