Difference between revisions of "Template:Heliodor"

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! colspan=2 | Heliodor
 
! colspan=2 | Heliodor
 
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| Chemical composition || Aluminium Beryllium Silicate Al<sub>2</sub>Be<sub>3</sub>(Si<sub>6</sub>O<sub>18</sub>)
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| Chemical composition || Be<sub>3</sub>Al<sub>2</sub>(SiO<sub>3</sub>)<sub>6</sub> Beryllium aluminum silicate
 
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|-
 
| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]]
 
| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]]
 
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|-
| Habit || edit me
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| Habit || Prismatic
 
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| Cleavage || edit me
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| Cleavage || Poor, basal
 
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|-
| Fracture || edit me
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| Fracture || Conchoidal to uneven
 
|-
 
|-
 
| Hardness || 7.5
 
| Hardness || 7.5
 
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|-
| Optic nature || edit me
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| Optic nature || Uniaxial -
 
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| Refraction index || 1.57 - 1.58
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| Refractive index || 1.57 - 1.58
 
|-  
 
|-  
| Birefringence || edit me
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| Birefringence || 0.004 - 0.009
 
|-
 
|-
| Dispersion || edit me
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| Dispersion || Low, 0.014
 
|-  
 
|-  
| Specific gravity || 2.80
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| Specific gravity || 2.7 - 2.9
 
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|-
 
| Lustre || Vitreous
 
| Lustre || Vitreous
 
|-
 
|-
| Pleochroism || edit me
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| Pleochroism || Weak to moderate (shades of body color)
 
|}
 
|}
 
__ToC__
 

Latest revision as of 17:27, 23 December 2006

Heliodor
Chemical composition Be3Al2(SiO3)6 Beryllium aluminum silicate
Crystal system Hexagonal
Habit Prismatic
Cleavage Poor, basal
Fracture Conchoidal to uneven
Hardness 7.5
Optic nature Uniaxial -
Refractive 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)