Difference between revisions of "Template:Heliodor"

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| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]]
 
| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]]
 
|-
 
|-
| Habit || edit me
+
| Habit || prismatice
 
|-
 
|-
| Cleavage || edit me
+
| Cleavage || poor, basal
 
|-
 
|-
| Fracture || edit me
+
| Fracture || conchoidal to uneven
 
|-
 
|-
 
| Hardness || 7.5
 
| Hardness || 7.5
 
|-
 
|-
| Optic nature || edit me
+
| Optic nature || uniaxial -
 
|-
 
|-
 
| Refraction index || 1.57 - 1.58
 
| Refraction index || 1.57 - 1.58
 
|-  
 
|-  
| Birefringence || edit me
+
| Birefringence || 0.004 - 0.009
 
|-
 
|-
| Dispersion || edit me
+
| Dispersion || low, 0.014
 
|-  
 
|-  
| Specific gravity || 2.80
+
| Specific gravity || 2.7 - 2.9
 
|-
 
|-
 
| Lustre || Vitreous
 
| Lustre || Vitreous
 
|-
 
|-
| Pleochroism || edit me
+
| Pleochroism || weak to moderate (shades of body color)
 
|}
 
|}
 
__ToC__
 

Revision as of 07:51, 25 October 2006

Heliodor
Chemical composition Beryllium Aluminium Silicate Be3Al2(SiO3)6
Crystal system Hexagonal
Habit prismatice
Cleavage poor, basal
Fracture conchoidal to uneven
Hardness 7.5
Optic nature uniaxial -
Refraction index 1.57 - 1.58
Birefringence 0.004 - 0.009
Dispersion low, 0.014
Specific gravity 2.7 - 2.9
Lustre Vitreous
Pleochroism weak to moderate (shades of body color)