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www.mineralgallery.co.za Minerals A-E |
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Allanite |
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Name
Allanite
Chemistry
(Ce,Ca,Y)2(Al,Fe)3(Si04)3(OH)
Uses
Source of rare earth metals, mineral specimen
Color
Black, brown, brownish violet (translucent)
Hardness
5.5
Specific gravity
3.0 - 4.2
Crystals
Monoclinic
Accompanied by:
Granite, Gneiss, Syenite
Fracture
Conchoidal.
Luster
Greasy, vitreous
Cleavage
Imperfect
Streak
Grayish brown, black
Similar to:
Biotite, Epidote, Monazite, Uranium, Zircon
Discovered by the Scottish mineralogist Thomas Thomson in 1810.
Also known as "Orthite".
Allanite is a rare earth mineral.
Allanite is slightly radioactive.
Allanite is found in different kinds of rocks such as Granite, Gneiss, and Syenite.
