Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.69-3.81
1
7.18
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Fracture
Uneven
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
{010} Perfect, {001} Distinct
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
3.5-48.5
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
BeAl 2 O 4