1 Physical Properties
1.2 Tenacity
1.4 Solubility
Not Available
Not Available
1.6 Durability
Not Available
Not Available
1.7 Specific Gravity
2.74-2.90Not Available
1
7.18
1.8 Fracture
Uneven, Gemstones (2009), Splintery
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
1.9 Cleavage
Perfect on {100} and {001}
None
1.10 Mohs Hardness
1.16 Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.