Difference between revisions of "Template:Vanadium Beryl"

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! colspan=2 | Emerald
 
! colspan=2 | Emerald
 
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| Chemical composition || Be<sub>3</sub>Al<sub>2</sub>(SiO<sub>3</sub>)<sub>6</sub> Beryllium aluminium silicate  
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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]]

Latest revision as of 21:24, 23 December 2006

Emerald
Chemical composition Be3Al2(SiO3)6 Beryllium aluminum silicate
Crystal system Hexagonal
Habit Prismatic
Cleavage Imperfect, basal
Fracture Conchoidal to uneven
Hardness 7.5 (brittle)
Optic nature Uniaxial -
Refractive index 1.566 - 1.600
Birefringence 0.004 - 0.010
Dispersion Low, 0.014
Specific gravity 2.67 - 2.78
Lustre Vitreous
Pleochroism Weak to distinct