General Information:
Chemical Formula:(Ce,La,Ca,Na,Th)4(Fe++,Mg2((Ti,Fe+++)3Si4O22
Environment:Secondary mineral in titanium and cerium bearing rocks.
IMA Status:Approved IMA 1987
Locality:Miask in the Ilmen Mountains, Russia.
Physical Properties: Cleavage:None
Color:brownish black or dark red.
Density:4.5
Diaphaniety:Translucent to subtranslucent to opaque
Habits:Acicular - Occurs as needle-like crystals., Massive - Uniformly indistinguishable crystals forming large masses., Amorphous - No crystalline form or imitative shape.
Hardness:5-5.5 - Apatite-Knife Blade
Luminescence:Non-fluorescent.
Luster:Earthy (Dull)
Streak:black
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