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| Ge |
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| OPTICAL |
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Transmission Range |
1.8 to 23 microns |
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Refractive Index |
4.0026 at 11 microns |
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Reflection Loss |
59.1% at 11 µm (2 surfaces) |
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Index of Absorption |
1.3 x 10-3 cm-1 at 3.8 microns |
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dN/dT |
396 x 10-6/°C |
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dN/dµ = 0 |
R.I. almost constant |
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| PHYSICAL |
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Density |
5.33 g/cm3 |
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Melting Point |
936°C |
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Thermal Conductivity |
58.61Wm-1K-1 at 293K |
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Thermal Expansion |
6.1 x 10-6/°C at 298K |
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Hardness |
Knoop 780 |
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Specific Heat Capacity |
310 J kg-1K-1 |
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Dielectric Constant |
16.6 at 9.37GHz at 300K |
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Young's Modulus (E) |
102.7 GPa |
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Shear Modulus (G) |
67 GPa |
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Bulk Modulus (K) |
77.2 GPa |
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Elastic Coefficients |
C11 = 129 C12 = 48.3 C44 = 67.1 |
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|
89.6 MPa (13000psi) |
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Poisson Ratio |
0.28 |
| CHEMICAL |
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Solubility |
Insoluble in water |
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Molecular Weight |
72.59 |
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Class/Structure |
Cubic diamond, Fd3m |
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