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Mineralpedia Details for Allanite-(La)

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Allanite-(La)

Allanite-(La)

Formula
CaLaFe2+Al2(Si2O7)(SiO4)O(OH) 
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
Imperfect, None 
Luster
Vitreous (Glassy) 
Color
brown, black 
Streak
grayish brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
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