Beryllium Aluminium Silicate Cr doped
Be3Al2(SiO3)6:Cr
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Chemical name
Beryllium Aluminium Silicate Cr doped |
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Mineral name
Emerald |
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Chemical formula
Be3Al2(SiO3)6:Cr |
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Melting point [°C]
1410 |
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Crystal system
hexagonal |
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Crystal Class
P6/m?c6/m 2/m 2/m) – dihexagonal dipyramidal |
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Unit cell
a [Å]:9,21 b [Å]: c [Å]:9,19 |
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Molecular weight [g/mol]
537,50 |
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Formula units
Z=2 |
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Frequent crystal surfaces
(0001), (10-10), (11-20) |
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Mohs hardness
7,5-8,0 |
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Color
green |
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Streak
white |
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Refractive Index
nε = 1.568–1.602 nω = 1.564–1.595 |
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Birefringence δ
? = 0.0040–0.0070 |
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Doping [%]
Cr |
