General Information:
Chemical Formula:
Fe++Fe+++5(PO4)4(OH)5·4(H2O)
Composition:
(Molecular Weight = 872.07 gm)
Iron 38.42 % Fe
Phosphorus 14.21 % P
Hydrogen 1.50 % H
Oxygen 45.87 % O
Empirical Formula:
Fe2+Fe3+5(PO4)4(OH)5·4(H2O)
Physical Properties:
Cleavage:
[100] Good
Color:
green, greenish brown, gray green, dark greenish brown, or dark red.
Density:
2.9
Diaphaniety:
Translucent
Habits:
Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Globula r - Spherical, or nearly so, rounded for
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Dull
Streak:
green brown
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