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Mineralpedia Details for Allanite-(Ce)

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Allanite-(Ce)

Allanite-(Ce)

Formula
CaCeFe2+Al2(Si2O7)(SiO4)O(OH) 
Crystal System
Monoclinic 
Crystal Habit
Massive - Granular, Disseminated 
Cleavage
Imperfect, Imperfect, None 
Luster
Vitreous - Greasy 
Color
brown, reddish brown, black 
Streak
grayish brown 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5.5 
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Allanite-(Ce) from Trimouns Talc mine, Luzenac, Ariège, Midi-Pyrénées, France

Allanite-(Ce)
            from Trimouns Talc mine, Luzenac, Ariège,  Midi-Pyrénées, France

Reddish brown crystal group with terminations. Good for allanite. Ex. Georg Gebhard.

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Allanite-(Ce) from Franklin, Sussex Co., New Jersey, United States

Allanite-(Ce)
            from Franklin, Sussex Co., New Jersey, United States

Small 3-6mm black tabular crystals in light green Microcline matrix. It is much as Dunn described. This is a large specimen.

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