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Violane
Violane
☒

Tantalite
Tantalite
☒



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Violane
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Tantalite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.03
Translucent
1.668-1.703
-
-
0.024-0.030
Translucent
 
Resinous
-
0.03
TransparentWalter Schumann
2.190-2.457
-
Orthorhombic
0.083
TransparentWalter Schumann

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