1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.355-3.4332.98-3.03
1
7.18
2.5 Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Uneven
2.6 Cleavage
{???} Good, {???} Good
[110] perfect; [010] distinct
2.7 Mohs Hardness
2.11 Chemical Composition
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.