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Cryolite
Sard
Sard and Cryolite Optical Properties


Optical Properties
Luster
Vitreous, Greasy, Pearly  
Waxy  
Pleochroism
colorless.  
-  
Dispersion
0.01  
99+
0.01  
99+
Transparency
-  
Translucent  
Refractive Index
1.338-1.339  
1.535-1.539  
Optic Character
-  
-  
Crystal System
monoclinic  
-  
Birefringence
0.001  
0.008-0.010  
Clarity
TransparentUlrich Henn and Claudio C. Milisenda  
Translucent  
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