1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.4 Durability
Not Available
Not Available
2.2 Specific Gravity
2.60-3.022.72-2.83
1
7.18
2.5 Fracture
Uneven
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
2.6 Cleavage
{001} Perfect
Good on {100} and {110}
2.7 Mohs Hardness
2.13 Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.