Difference between revisions of "Template:Hiddenite"

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| Optic nature ||  
 
| Optic nature ||  
 
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| Refraction index || 1.66
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| Refractive index || 1.66
 
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|-  
 
| Birefringence || weak
 
| Birefringence || weak

Revision as of 11:44, 1 November 2006

Hiddenite
Chemical composition Lithium Aluminium Silicate LiAlSi2O6
Crystal system Monoclinic
Habit prismatic
Cleavage perfect in two directions
Fracture splintery
Hardness 6.5
Optic nature
Refractive index 1.66
Birefringence weak
Dispersion
Specific gravity 3.2
Lustre vitreous
Pleochroism strong