Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.762.33-2.37
1
7.18
👆🏻
Fracture
Uneven
ConchoidalWalter Schumann
Cleavage
{010} Perfect, {001} Distinct
Perfect on {010}, good on {100}
Mohs Hardness
3.5-47.5
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Be 2BO 3(OH)Ulrich Henn and Claudio C.