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Phosphosiderite
Apophyllite
Apophyllite and Phosphosiderite Optical Properties


Optical Properties
Luster
Vitreous  
Vitreous, Pearly  
Pleochroism
Pale rose-red carmine-red colorlessAnthony et al  
Dichroic (colorless)  
Dispersion
0.04  
36
0.01  
99+
Transparency
Transparent  
Transparent, Translucent  
Refractive Index
1.692-1.739  
1.530-1.543  
Optic Character
-  
Uniaxial/-  
Crystal System
-  
tetragonal  
Birefringence
0.240  
0.000-0.003  
Clarity
Transparent  
Transparent  
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