General Information:
Chemical Formula:
Al2/3Fe+++4(SO4)6O(OH)2·20(H2O)
Composition:
(Molecular Weight = 1,212.08 gm)
Aluminum 1.48 % Al
Iron 18.43 % Fe
Hydrogen 3.49 % H
Sulfur 15.87 % S
Oxygen 60.72 % O
Empirical Formula:
Al0.6666Fe3+4(SO4)6(OH)2·20(H2O)
Physical Properties:
Color:
yellow.
Diaphaniety:
Transparent to Translucent
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Earthy (Dull)
Streak:
light yellow
More details...