General Information:
Chemical Formula:
Al3(UO2)4(PO4)4(OH)5·5(H2O)
Composition:
(Molecular Weight = 1,716.05 gm)
Uranium 55.48 % U
Aluminum 4.72 % Al
Phosphorus 7.22 % P
Hydrogen 0.88 % H
Oxygen 31.70 % O
Empirical Formula:
Al3(UO2)4(PO4)4(OH)5·5(H2O)
Environment:
Complex pegmatite.
IMA Status:
Approved IMA 1982
Locality:
Kobokobo, Kivu, Zaire.
Name Origin:
Named for the triangular habit of the crystals.
Physical Properties:
Cleavage:
[???] Perfect
Color:
yellow or bright yellow.
Density:
3.7
Habits:
Triangular Crystals - Occurs as triangular shaped crystals., Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals., Aggregates - Made of numerous indivi dual crystals or clusters.
Hardness:
2-3 - Gypsum-Calcite
Luminescence:
Non-fluorescent.
Streak:
light yellow
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