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Pyrophyllite and Neptunite Optical Properties


Optical Properties

Luster
Vitreous  
Pearly  

Pleochroism
x=yellow-orange  
-  

Dispersion
0.03  
99+
0.05  
29

Transparency
Translucent  
Translucent  

Refractive Index
1.692-1.734  
1.534-1.601  

Optic Character
-  
-  

Crystal System
monoclinic  
-  

Birefringence
0.0294-0.0452  
0.050  

Clarity
Translucent  
Translucent  

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