General Information:
Chemical Formula:
Fe+++2/3Fe+++4(SO4)6(OH)2·20(H2O)
Composition:
(Molecular Weight = 1,231.32 gm)
Iron 21.17 % Fe
Hydrogen 3.44 % H
Sulfur 15.63 % S
Oxygen 59.77 % O
Empirical Formula:
Fe3+0.6666Fe3+4(SO4)6(OH)2·20(H2O)
Physical Properties:
Cleavage:
[???] Perfect
Color:
yellow or orange.
Density:
2.1
Diaphaniety:
Transparent to Translucent
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Pearly
Streak:
light yellow
More details...