General Information:
Chemical Formula:K2Fe++5Fe+++3Al(SO4)12·18H2O
Composition:(Molecular Weight = 2,028.99 gm)Potassium 3.85 %
K Aluminum 1.33 %
AlIron 22.02 %
FeHydrogen 1.79 %
H Sulfur 18.96 %
S Oxygen 52.04 %
O Empirical Formula: K2Fe2+5Fe3+3Al(SO4)12·18(H2O)
Name Origin:Named after the Italian physicist, A. G. A. A. Volta (1745-1841).
Physical Properties: Cleavage:None
Color:greenish black, dark green, olive green, or black.
Density:2.6 - 2.8, Average = 2.7
Diaphaniety:Opaque
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., Crystalline - Fine - Occurs as well-formed fine sized crystals.,
Hardness:3-3.5 - Calcite-Copper Penny
Luminescence:None.
Luster:Silky
Streak:grayish green
More details...
