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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