Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.16-3.234.1-4.3
1
7.18
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Fracture
Conchoidal, Uneven, Conchoidal to uneven
Uneven
Cleavage
[0001] indistinct, [1010] indistinct
Indistinct on {011}
Mohs Hardness
53.5-4
2
10
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Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
CuFeS 2Anthony et al , Handbook of mineralogy (2001)