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Ytterbium Foil (Light Tight)

Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Ytterbium Form: Foil (Light Tight) Composition: Yb CAS Number: 7440-64-4 Purity: 99% Temper: As Rolled Opacity: Light Tight
Ytterbium Foil Light Tight offers the same ductility and reactivity as standard ytterbium foil but is manufactured to be completely free of pinholes, ensuring total opacity to light. This makes it highly suitable for optical shielding, sensitive photonic experiments, and applications requiring the prevention of light transmission. Industries such as photonics, vacuum technology, and sensor manufacturing use light-tight ytterbium foil for shielding sensitive optical detectors, isolating photoreactive materials, and protecting instruments from stray light interference. Specific applications include experimental setups in spectroscopy, optical bench isolation, and fabrication of photonic devices. In research, it supports studies where precise control of light exposure is essential. Its ability to combine rare-earth metal properties with complete light blockage makes it uniquely valuable in specialized optical and high-vacuum environments.
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Material Properties

Atomic Properties
Element Value
Atomic number 70
Crystal structure Hexagonal close packed
Electronic structure Xe 4f¹⁴ 6s²
Valences shown 2,3
Atomic weight( amu ) 173.04
Thermal neutron absorption cross-section( Barns ) 37
Natural isotope distribution( Mass No./% ) 173/ 16.2
Natural isotope distribution( Mass No./% ) 174/ 31.7
Natural isotope distribution( Mass No./% ) 172/ 21.9
Natural isotope distribution( Mass No./% ) 168/ 0.1
Natural isotope distribution( Mass No./% ) 170/ 3.1
Natural isotope distribution( Mass No./% ) 171/ 14.3
Natural isotope distribution( Mass No./% ) 176/ 12.7
Atomic radius - Goldschmidt( nm ) 0.193
Ionisation potential( No./eV ) 3/ 25.2
Ionisation potential( No./eV ) 2/ 12.2
Ionisation potential( No./eV ) 1/ 6.25
Mechanical Properties
Element Value
Hardness - Brinell 25
Material condition Polycrystalline
Poisson's ratio 0.28
Bulk modulus( GPa ) 13.5
Tensile modulus( GPa ) 17.8
Tensile strength( MPa ) 68.9
Yield strength( MPa ) 65.5
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 28@20°C
Temperature coefficient( K⁻¹ ) 0.0013@0-100°C
Physical Properties
Element Value
Boiling point( C ) 1194
Density( gcm⁻³ ) 6.977@20°C
Thermal Properties
Element Value
Melting point( C ) 819
Latent heat of evaporation( J g⁻¹ ) 921
Latent heat of fusion( J g⁻¹ ) 53.2
Specific heat( J K⁻¹ kg⁻¹ ) 145@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 32.9@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 25@0-100°C
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Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Ytterbium Form: Foil (Light Tight) Composition: Yb CAS Number: 7440-64-4 Purity: 99% Temper: As Rolled Opacity: Light Tight

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Tolerances

Foil (Light Tight)
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%