General Information:
Chemical Formula:
CaAl2(PO4)2(OH)2·(H2O)
Composition:
(Molecular Weight = 336.01 gm)
Calcium 11.93 % Ca
Aluminum 16.06 % Al
Phosphorus 18.44 % P
Hydrogen 1.20 % H
Oxygen 52.38 % O
Empirical Formula:
CaAl2(PO4)2(OH)2·(H2O)
IMA Status:
Approved IMA 1977
Locality:
Buranga pegmatite, near Gatumba, Gisenyi Province, Rwanda.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[???] Good, [???] Good
Color:
white.
Density:
2.92
Diaphaniety:
Translucent
Habits:
Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat., Rosette - Bundled tabular aggregates resembling rose flower petals., Scaly - Morphology like fish scales.
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
Non-fluorescent.
Luster:
Pearly
Streak:
white
More details...