Parasymplesite

General Information:
 Chemical Formula:
Fe++3(AsO4)2·8(H2O)
 Composition:
(Molecular Weight = 589.50 gm)
Iron 28.42 % Fe
Arsenic 25.42 % As
Hydrogen 2.74 % H 
Oxygen 43.42 % O 
 Empirical Formula:
Fe2+3(AsO4)2·8(H2O)
Physical Properties:
 Cleavage:
[010] Perfect
 Color:
greenish blue or light greenish blue.
 Density:
3.07
 Diaphaniety:
Translucent
 Hardness:
2 - Gypsum
 Luster:
Silky
 Streak:
white
More details...