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Germanium Disc

Germanium Discs are a semiconductor material that comes in 2 variations that differ in diameter, thickness and surface finish. Germanium has useful properties like a high carrier mobility and a low optical absorption coefficient. Discs made from germanium have applications in optics, electronics and radiation detection devices. The range of germanium discs from Goodfellow allows flexibility in selecting the right option for your application.
Diameter: 101.6mm
Technical Name: Germanium
Formula: Ge
Percentage Purity: 99.999%
Density: 5.323g/cm³
CAS Number: 7440-56-4
Electrical Type: N-Type
Structure: Polycrystalline
Thickness: 1mm
UOM Code: 776-389-66
SKU: 1000117126
Product Code: GE00-SH-000123

Tolerances

Disc
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
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Tolerances

Disc
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Technical Data Sheet
Safety Data Sheet

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Material Properties for Metals

Atomic Properties
Element Value
Atomic number 32
Crystal structure Diamond
Electronic structure Ar 3d¹⁰ 4s² 4p²
Valences shown 2,4
Atomic weight( amu ) 72.59
Thermal neutron absorption cross-section( Barns ) 2.3
Photo-electric work function( eV ) 4.8
Natural isotope distribution( Mass No./% ) 72/ 27.4
Natural isotope distribution( Mass No./% ) 73/ 7.8
Natural isotope distribution( Mass No./% ) 76/ 7.8
Natural isotope distribution( Mass No./% ) 70/ 20.5
Natural isotope distribution( Mass No./% ) 74/ 36.5
Atomic radius - Goldschmidt( nm ) 0.139
Ionisation potential( No./eV ) 4/ 45.7
Ionisation potential( No./eV ) 3/ 34.22
Ionisation potential( No./eV ) 1/ 7.90
Ionisation potential( No./eV ) 5/ 93.5
Ionisation potential( No./eV ) 2/ 15.93
Mechanical Properties
Element Value
Hardness - Mohs 6.25
Material condition Polycrystalline
Poisson's ratio 0.32
Bulk modulus( GPa ) 73.9
Tensile modulus( GPa ) 79.9
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 46x10⁶@22@22°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 33.9
Physical Properties
Element Value
Boiling point( C ) 2830
Density( gcm⁻³ ) 5.32@20°C
Thermal Properties
Element Value
Melting point( C ) 937.4
Latent heat of evaporation( J g⁻¹ ) 4516
Latent heat of fusion( J g⁻¹ ) 465
Specific heat( J K⁻¹ kg⁻¹ ) 322@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 60.2@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 5.75@0-100°C
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