Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.16-3.235.06-5.08
1
7.18
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Fracture
Conchoidal, Uneven, Conchoidal to uneven
Uneven, Subconchoidal, Conchoidal
Cleavage
[0001] indistinct, [1010] indistinct
Poor on [111].
Mohs Hardness
53-3.25
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
Cu5FeS4