General Information:
Chemical Formula:
Ca2Fe+++3(AsO4)3O2·3(H2O)
Composition:
(Molecular Weight = 766.50 gm)
Calcium 10.46 % Ca
Iron 21.86 % Fe
Arsenic 29.32 % As
Hydrogen 0.79 % H
Oxygen 37.57 % O
Empirical Formula:
Ca2Fe3+3(AsO4)3O3·3(H2O)
Physical Properties:
Cleavage:
[100] Good
Color:
bronze brown, yellow, yellow brown, dark brown, or black.
Density:
3.5 - 3.9, Average = 3.7
Diaphaniety:
Translucent to Opaque
Habits:
Fibrous - Crystals made up of fibers., ,
Hardness:
1.5 - Between Talc and Gypsum
Luminescence:
Non-fluorescent.
Luster:
Sub Metallic
Streak:
ochraceous
More details...