Difference between revisions of "Template:Goshenite"
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! colspan=2 | Goshenite | ! colspan=2 | Goshenite | ||
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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 || Poor, basal |
|- | |- | ||
− | | Fracture || | + | | Fracture || Conchoidal to uneven |
|- | |- | ||
| Hardness || 7.5 | | Hardness || 7.5 | ||
|- | |- | ||
− | | Optic nature || | + | | Optic nature || Uniaxial - |
|- | |- | ||
− | | | + | | Refractive index || 1.57 - 1.59 |
|- | |- | ||
− | | Birefringence || | + | | Birefringence || 0.004 - 0.009 |
|- | |- | ||
− | | Dispersion || | + | | Dispersion || Low, 0.014 |
|- | |- | ||
− | | Specific gravity || 2. | + | | Specific gravity || 2.7 - 2.9 |
|- | |- | ||
| Lustre || Vitreous | | Lustre || Vitreous | ||
|- | |- | ||
− | | Pleochroism || | + | | Pleochroism || None |
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Latest revision as of 17:26, 23 December 2006
Goshenite | |
---|---|
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 - 1.59 |
Birefringence | 0.004 - 0.009 |
Dispersion | Low, 0.014 |
Specific gravity | 2.7 - 2.9 |
Lustre | Vitreous |
Pleochroism | None |