Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.512.74-2.76
1
7.18
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Fracture
-
Uneven
Cleavage
None
{010} Perfect, {001} Distinct
Mohs Hardness
-99993.5-4
2
10
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Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)