General Information:
Chemical Formula:
(NH4)(Fe+++,Al)(SO4)2·12(H2O)
Composition:
(Molecular Weight = 474.98 gm)
Aluminum 1.42 % Al
Iron 8.82 % Fe
Hydrogen 5.94 % H
Sulfur 13.50 % S
Nitrogen 2.95 % N
Oxygen 67.37 % O
Empirical Formula:
(NH4)Fe3+0.75Al0.25(SO4)2·12(H2O)
IMA Status:
Approved IMA
Locality:
Lone Creek Fall cave, near Sabie, eastern Transvaal, South Africa.
Name Origin:
Named for the locality.
Physical Properties:
Color:
colorless.
Density:
1.693
Diaphaniety:
Transparent
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous (Glassy)
Streak:
white
More details...