General Information:
Chemical Formula:
(NH4)Al(SO4)2·12(H2O)
Composition:
(Molecular Weight = 453.33 gm)
Aluminum 5.95 % Al
Hydrogen 6.23 % H
Sulfur 14.15 % S
Nitrogen 3.09 % N
Oxygen 70.59 % O
Empirical Formula:
(NH4)·12(H2O)Al(SO4)2
Locality:
Cermniky, Czechoslovakia.
Name Origin:
Named after the locality.
Physical Properties:
Cleavage:
[100] Perfect
Color:
white or colorless.
Density:
1.65
Diaphaniety:
Transparent to translucent
Habits:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals., Fibrous - Crystals made up of fibers.,
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
None.
Luster:
Vitreous (Glassy)
Streak:
white
More details...