General Information:
Chemical Formula:
MgFe+++4(SO4)6(OH)2·20(H2O)
Composition:
(Molecular Weight = 1,218.39 gm)
Magnesium 1.99 % Mg
Iron 18.33 % Fe
Hydrogen 3.47 % H
Sulfur 15.79 % S
Oxygen 60.41 % O
Empirical Formula:
MgFe3+4(SO4)6(OH)2·20(H2O)
Physical Properties:
Cleavage:
[010] Perfect, [101] Indistinct
Color:
green yellow, yellow, yellow green, or orange.
Density:
2.08 - 2.17, Average = 2.12
Diaphaniety:
Transparent to Translucent
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Pearly
Streak:
light yellow
More details...