General Information:
Chemical Formula:
(NH4)(Al,Fe+++)(SO4)2
Composition:
(Molecular Weight = 244.36 gm)
Aluminum 8.28 % Al
Iron 5.71 % Fe
Hydrogen 1.65 % H
Sulfur 26.24 % S
Nitrogen 5.73 % N
Oxygen 52.38 % O
Empirical Formula:
(NH4)Al0.75Fe3+0.25(SO4)2
IMA Status:
Approved IMA
Physical Properties:
Color:
white or colorless.
Density:
2.53
Diaphaniety:
Transparent to Translucent
Hardness:
2 - Gypsum
Luster:
Earthy (Dull)
Streak:
white
More details...