General Information:
Chemical Formula:
Fe+++Al2(PO4)2(OH)3·5(H2O)
Composition:
(Molecular Weight = 440.85 gm)
Aluminum 12.24 % Al
Iron 12.67 % Fe
Phosphorus 14.05 % P
Hydrogen 2.97 % H
Oxygen 58.07 % O
Empirical Formula:
Fe3+Al2(PO4)2(OH)3·5(H2O)
IMA Status:
Approved IMA 1962
Physical Properties:
Cleavage:
[010] Perfect, [001] Good
Color:
brown, light brown, light yellow, or straw yellow.
Density:
2.35
Diaphaniety:
Transparent
Hardness:
3 - Calcite
Luster:
Vitreous - Pearly
Streak:
white
More details...