General Information:
Chemical Formula:
Fe+++4(AsO4)2O3
Composition:
(Molecular Weight = 549.22 gm)
Iron 40.67 % Fe
Arsenic 27.28 % As
Oxygen 32.04 % O
Empirical Formula:
Fe3+4(AsO4)2O3
IMA Status:
Approved IMA 1959
Physical Properties:
Cleavage:
[???] Indistinct
Color:
black brown.
Density:
4.867
Hardness:
5.5 - Knife Blade
Luster:
Adamantine - Metallic
Streak:
reddish brown
More details...