General Information:
Chemical Formula:
(Ca,Fe++,REE,Zr,Th)(Zr,Nb,Ti,Ta,Fe+++)Ti2O7
Environment:
In pegmatites.
Locality:
Fredriksvarn, Norway.
Name Origin:
Named for the composition.
Physical Properties:
Color:
black or brown.
Density:
4.8
Habits:
Striated - Parallel lines on crystal surface or cleavage face., Massive - Uniformly indistinguishable crystals forming large masses., Prismatic - Crystals Shaped like Slender Prisms ( e.g. tourmaline).
Hardness:
6.5 - Pyrite
Luminescence:
Non-fluorescent.
Streak:
dark brown
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