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Zinnwaldite
Zinnwaldite
☒

Franklinite
Franklinite
☒



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Zinnwaldite
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Franklinite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Pearly, Vitreous
Distinct
0.02
-
1.565-1.625
-
monoclinic
0.040-0.050
-
 
-
-
0.19
Translucent
-9999
-
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
-9999
Translucent

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