General Information:
Chemical Formula:
(NH4,K)2Fe+++Cl5·(H2O)
Composition:
(Molecular Weight = 297.73 gm)
Potassium 6.57 % K
Iron 18.76 % Fe
Hydrogen 2.71 % H
Nitrogen 7.06 % N
Chlorine 59.54 % Cl
Oxygen 5.37 % O
Empirical Formula:
NH41.5K0.5Fe3+Cl5·(H2O)
Environment:
Acidic fumaroles.
Locality:
Vesuvius, Italy and Mt. Etna, Sicily,
Physical Properties:
Cleavage:
[210] Perfect, [011] Perfect
Color:
brown red or red.
Density:
2.17
Diaphaniety:
Transparent to Translucent
Habits:
Pseudo Octohedral - Crystals show an octohedral outline., ,
Luster:
Vitreous (Glassy)
More details...