General Information:
Chemical Formula:
Ca4Fe++(Fe+++,Al)4(PO4)6(OH)4·12(H2O)
Composition:
(Molecular Weight = 1,233.18 gm)
Calcium 13.00 % Ca
Magnesium 1.97 % Mg
Aluminum 2.19 % Al
Iron 13.59 % Fe
Phosphorus 15.07 % P
Hydrogen 2.29 % H
Oxygen 51.90 % O
Empirical Formula:
·12(H2O)Ca4MgFe3+3Al(PO4)6(OH)4
Environment:
Found in a bed of Tertiary clay. The Fe-analog of montgomeryite.
Locality:
Battenberg, Bavaria, Germany.
Name Origin:
Named for its compostion.
Physical Properties:
Cleavage:
[???] Perfect, [???] Very Good
Color:
greenish yellow, yellow, yellow green, or yellowish white.
Density:
2.53
Diaphaniety:
Translucent to Opaque
Habits:
Foliated - Two dimensional platy forms., Reniform - "Kidney like" in shape (e.g.. hematite).,
Hardness:
2.5 - Finger Nail
Luster:
Pearly
Streak:
yellowish white
More details...