General Information:
Chemical Formula:
CuAl4(SO4)(OH)12·3(H2O)
Composition:
(Molecular Weight = 525.67 gm)
Aluminum 20.53 % Al
Copper 12.09 % Cu
Hydrogen 3.45 % H
Sulfur 6.10 % S
Oxygen 57.83 % O
Empirical Formula:
CuAl4(SO4)(OH)12·3(H2O)
Physical Properties:
Cleavage:
[100] Perfect
Color:
blue, blue gray, greenish blue, or light blue green.
Density:
2.29
Diaphaniety:
Transparent to Translucent
Habits:
Fibrous - Crystals made up of fibers., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Dull
Streak:
bluish white
More details...