Images are for guidance only and might not represent the final product.
Formula: Ge
Form: Single Crystal
Material: Germanium
CAS Number: 7440-56-4
Commodity: Metals
Purity: 99.999%
Germanium Single Crystal from Goodfellow is a high-purity semiconductor material grown into a monocrystalline form. With a diamond cubic crystal structure, it has a grayish metallic appearance and a lustrous surface. Germanium's electrical properties, including its moderate bandgap and high electron mobility, make it useful for semiconductor devices. This germanium single crystal is well-suited to applications like transistors, solar cells, and infrared optics. As part of Goodfellow's wide range of single crystal products, it enables research and development across electronics, photonics, and more.
Technical Data Sheet Safety Data Sheet Tolerance Properties
each

We are collecting your products, please wait!...

Shipping restrictions and charges
may apply for some hazardous materials.

Tolerances

Single Crystal
Orientation See Item
Thickness +2% / -1%
Length +2% / -1%

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

Can't find what you're looking for? For customized options

Other Customers Purchased
  1. Starting at $307.51

    each
    Discounts applied for volume purchases
    View Product
  2. Tungsten Top Hat Single Crystal Formula: W
    Percentage Purity: 99.99%
    Top Section Thickness: 1mm
    Bottom Section Thickness: 1mm
    Outside Diameter: 10mm
    Inside Diameter: 8mm
    Orientation: -110
    Orientation Accuracy: Approx. 0.1°
    Polish: Polished
    Surface Finish: =< 0.03µm Ra
    CAS Number: 7440-33-7
    UOM Code: 128-551-93

    Starting at $1,990.23

    each
    Discounts applied for volume purchases
    View Product
  3. Starting at $338.58

    each
    Discounts applied for volume purchases
    View Product
  4. Starting at $1,156.08

    each
    Discounts applied for volume purchases
    View Product
  5. Starting at $1,394.99

    each
    Discounts applied for volume purchases
    View Product