Difference between revisions of "Template:Bixbite"

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Line 17: Line 17:
 
| Optic nature || uniaxial -
 
| Optic nature || uniaxial -
 
|-
 
|-
| Refraction index || 1.561 - 1.577
+
| Refractive index || 1.561 - 1.577
 
|-  
 
|-  
 
| Birefringence || 0.004 - 0.009
 
| Birefringence || 0.004 - 0.009

Revision as of 10:35, 1 November 2006

Bixbite
Chemical composition Beryllium Aluminium Silicate Be3Al2(SiO3)6
Crystal system Hexagonal
Habit prismatic
Cleavage basal, poor
Fracture conchoidal to uneven
Hardness 7.5 - 8
Optic nature uniaxial -
Refractive index 1.561 - 1.577
Birefringence 0.004 - 0.009
Dispersion low, 0.014
Specific gravity 2.63 - 2.72
Lustre Vitreous
Pleochroism weak