Difference between revisions of "Template:Aquamarine"
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! colspan=2 | Aquamarine | ! colspan=2 | Aquamarine | ||
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− | | Chemical composition || | + | | Chemical composition || Be<sub>3</sub>Al<sub>2</sub>(SiO<sub>3</sub>)<sub>6</sub> Beryllium aluminum silicate |
|- | |- | ||
| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]] | | Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]] | ||
|- | |- | ||
− | | Habit || | + | | Habit || Prismatic |
|- | |- | ||
− | | Cleavage || | + | | Cleavage || Imperfect, basal, almost never seen |
|- | |- | ||
− | | | + | | Hardness || 7.5 to 8 |
|- | |- | ||
− | | | + | | Optic nature || Uniaxial - |
|- | |- | ||
− | | | + | | Refractive index || 1.577-1.583 <br> (+0.017, - 0.017) |
− | |||
− | |||
|- | |- | ||
− | | Birefringence || | + | | Birefringence || 0.005-0.009 |
|- | |- | ||
− | | Dispersion || | + | | Dispersion || Low, 0.014 |
|- | |- | ||
− | | Specific gravity || 2. | + | | Specific gravity || 2.72 <br>(+0.18,-0.5) |
|- | |- | ||
| Lustre || Vitreous | | Lustre || Vitreous | ||
|- | |- | ||
− | | Pleochroism || | + | | Pleochroism || Weak to moderate |
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Latest revision as of 11:53, 24 December 2006
Aquamarine | |
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Chemical composition | Be3Al2(SiO3)6 Beryllium aluminum silicate |
Crystal system | Hexagonal |
Habit | Prismatic |
Cleavage | Imperfect, basal, almost never seen |
Hardness | 7.5 to 8 |
Optic nature | Uniaxial - |
Refractive index | 1.577-1.583 (+0.017, - 0.017) |
Birefringence | 0.005-0.009 |
Dispersion | Low, 0.014 |
Specific gravity | 2.72 (+0.18,-0.5) |
Lustre | Vitreous |
Pleochroism | Weak to moderate |