Difference between revisions of "Template:Goshenite"
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| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]] | | Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]] | ||
|- | |- | ||
− | | Habit || | + | | Habit || prismatice |
|- | |- | ||
− | | Cleavage || | + | | Cleavage || poor, basal |
|- | |- | ||
− | | Fracture || | + | | Fracture || conchoidal to uneven |
|- | |- | ||
| Hardness || 7.5 | | Hardness || 7.5 | ||
|- | |- | ||
− | | Optic nature || | + | | Optic nature || uniaxial - |
|- | |- | ||
− | | Refraction index || 1. | + | | Refraction 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 |
|} | |} | ||
− | |||
− |
Revision as of 07:42, 25 October 2006
Goshenite | |
---|---|
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 - 1.59 |
Birefringence | 0.004 - 0.009 |
Dispersion | low, 0.014 |
Specific gravity | 2.7 - 2.9 |
Lustre | Vitreous |
Pleochroism | none |