Tenacity
-
Brittle
Solubility
insoluble
-
Durability
-
-
Specific Gravity
2.365.6-5.76
1
7.18
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Fracture
Uneven, Subconchoidal, Fibrous
Uneven
Cleavage
[110] perfect, [101] good, [010] distinct
[001] perfect; [100] distinct
Mohs Hardness
3.5-42.5-3
2
10
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Chemical Composition
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)