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PRODUCT DATA of Germanium
MaterialGermanium
General InformationThe refractive index of Germanium changes rapidly with temperature and the material becomes opaque at all wavelengths a little above 350K as the band gap floods with thermal electrons
Chemical Composition100Ge
CAS Registry ID7440-56-4
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Equivalent DesignationsGe
Space ExperienceGood
PHYSICAL PROPERTIES
Atomic Number32
Atomic Weight72.6 amu
Work Function4.8 eV
Crystal StructureDiamond
Specific Gravity5.33
ELASTIC PROPERTIES
Tensile Modulus103 GPa
Shear Modulus67 GPa
Bulk Modulus77.2 GPa
Poisson Ratio0.28
THERMAL PROPERTIES
Thermal Conductivity58.6 W/m.
Thermal Expansion Coefficient6.1 μstrain/°C
Melting Range936 °C
Specific Heat0.31 J/g.K