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Mineralpedia Details for Fersmanite

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Fersmanite

Fersmanite

Formula
Ca4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3 
Crystal System
Monoclinic 
Crystal Habit
Pseudo Tetragonal 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
golden yellow, resin brown, light brown, dark brown 
Streak
brownish white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
5.5 
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