Difference between revisions of "Template:Sapphire"

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Line 7: Line 7:
 
| Crystal system || [[Crystals_&_Their_Structure#Trigonal_Crystal_System | Trigonal]]
 
| Crystal system || [[Crystals_&_Their_Structure#Trigonal_Crystal_System | Trigonal]]
 
|-
 
|-
| Habit || prismatic, tabular
+
| Habit || Prismatic, tabular
 
|-
 
|-
| Cleavage || poor
+
| Cleavage || Poor
 
|-
 
|-
| Fracture || conchoidal
+
| Fracture || Conchoidal
 
|-
 
|-
 
| Hardness || 9
 
| Hardness || 9
 
|-
 
|-
| Optic nature || uniaxial -
+
| Optic nature || Uniaxial -
 
|-
 
|-
 
| Refractive index || 1.76-1.78
 
| Refractive index || 1.76-1.78
Line 21: Line 21:
 
| Birefringence || 0.008-0.009
 
| Birefringence || 0.008-0.009
 
|-
 
|-
| Dispersion || low, 0.018
+
| Dispersion || Low, 0.018
 
|-  
 
|-  
 
| Specific gravity || 4
 
| Specific gravity || 4
 
|-
 
|-
| Lustre || bright vitreous
+
| Lustre || Bright vitreous
 
|-
 
|-
| Pleochroism || weak to moderate
+
| Pleochroism || Weak to moderate
 
|}
 
|}

Revision as of 20:05, 23 December 2006

Sapphire
Chemical composition Al2O3
Crystal system Trigonal
Habit Prismatic, tabular
Cleavage Poor
Fracture Conchoidal
Hardness 9
Optic nature Uniaxial -
Refractive index 1.76-1.78
Birefringence 0.008-0.009
Dispersion Low, 0.018
Specific gravity 4
Lustre Bright vitreous
Pleochroism Weak to moderate