General Information:
Chemical Formula:
(Ce,Ca)5(SiO4,PO4)3(OH,F)
Environment:
Nepheline-synite rocks.
IMA Status:
Approved IMA 1987
Locality:
Julianehaab, South Greenland.
Physical Properties:
Cleavage:
None
Color:
brown, greenish brown, yellow, resin brown, or black.
Density:
4.4
Diaphaniety:
Transparent to translucent
Habits:
Pseudo Hexagonal - Crystals show a hexagonal outline., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
5.5 - Knife Blade
Luster:
Vitreous (Glassy)
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