Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.772.82
1
7.18
👆🏻
Fracture
-
-
Cleavage
{110} Perfect, {110} Perfect
Perfect in one direction, indistinct in one direction
Mohs Hardness
5-66
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]