| Formula | Ge | ||||||||||||
| Growth method | Czochralski technique | ||||||||||||
| Max. sizes, (mm) | Ø200 | ||||||||||||
| Transmission range, (µm) (Thickness 10 mm) | 2.0 – 18.0 | ||||||||||||
| Structure | cubic | ||||||||||||
| Density (g/cm3) | 5.33 | ||||||||||||
| Melting point (°C) | 937 | ||||||||||||
| Hardness (Mohs) | 6 | ||||||||||||
| Thermal expansion coefficient (10-6/K) | 5.1 -5.8 | ||||||||||||
| Thermal conductivity (W m-1 K-1) | 59.8 | ||||||||||||
| Specific heat capacity (J kg-1 K-1) | 310 | ||||||||||||
| Solubility in water (g/100 cm3) | insoluble | ||||||||||||
| Solubility in acids | soluble in mixture of HCl and HNO3 and in H2O2 | ||||||||||||
| Solubility in organic solvents | insoluble | ||||||||||||
| Wavelength (µm) Refractive index |
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| Absorption coefficient (cm-1) | 0.02 at 10.6 µm |
