Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.98-3.104.1-4.3
1
7.18
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Fracture
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Uneven
Cleavage
[100] Perfect, [110] Good, [011] Distinct
Indistinct on {011}
Mohs Hardness
63.5-4
2
10
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Chemical Composition
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
CuFeS 2Anthony et al , Handbook of mineralogy (2001)