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Formula: Au
Form: Foil (Light Tight)
Material: Gold
CAS Number: 7440-57-5
Commodity: Precious Metals
Light Tight:
Light Tight
Gold Foil (Light Tight) from Goodfellow is an ultra-thin gold metal foil with excellent light blocking properties. Available in 205 variations, it’s used extensively for radiation shielding in medical, aerospace and optical applications where complete opacity to light across a broad wavelength range is critical. This foil can be layered, rolled or laminated while maintaining its light-tight characteristics. With its unique combination of high density and ductility, Gold Foil (Light Tight) is the perfect choice when superior light blocking is needed in a thin, malleable material.
Material Properties for Precious Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 79 |
| Crystal structure | Face centred cubic |
| Electronic structure | Xe 4f¹⁴ 5d¹⁰ 6s¹ |
| Valences shown | 1,3 |
| Atomic weight( amu ) | 196.9665 |
| Thermal neutron absorption cross-section( Barns ) | 98.8 |
| Photo-electric work function( eV ) | 4.8 |
| Atomic radius - Goldschmidt( nm ) | 0.144 |
| Ionisation potential( No./eV ) | 1/ 9.22 |
| Ionisation potential( No./eV ) | 2/ 20.5 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Soft |
| Material condition | Hard |
| Poisson's ratio | 0.42 |
| Poisson's ratio | 0.42 |
| Bulk modulus( GPa ) | 171 |
| Bulk modulus( GPa ) | 171 |
| Tensile modulus( GPa ) | 78.5 |
| Tensile modulus( GPa ) | 78.5 |
| Hardness - Vickers( kgf mm⁻² ) | 20-30 |
| Hardness - Vickers( kgf mm⁻² ) | 60 |
| Tensile strength( MPa ) | 130 |
| Tensile strength( MPa ) | 220 |
| Yield strength( MPa ) | 205 |
| Yield strength( MPa ) | - |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 2.20@20@20°C |
| Temperature coefficient( K⁻¹ ) | 0.004@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | 0.74 |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 3080 |
| Density( gcm⁻³ ) | 19.3@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 1064.4 |
| Latent heat of evaporation( J g⁻¹ ) | 1738 |
| Latent heat of fusion( J g⁻¹ ) | 64.9 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 129@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 318@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 14.1@0-100°C |
Other Customers Purchased
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Terbium Foil (Light Tight) Formula: Tb
Percentage Purity: 93%
Temper: As Rolled
Thickness: 0.6mm
Length 1: 50mm
Length 2: 50mm
UOM Code: 436-560-65
eachStarting at £0.00
Discounts applied for volume purchases -
Platinum/Rhodium Alloy Foil (Light Tight) (Pt60/Rh40) Formula: Pt60/Rh40
Temper: As Rolled
Thickness: 0.125mm
Length 1: 25mm
Length 2: 25mm
UOM Code: 742-121-52
eachStarting at £2,299.95
Discounts applied for volume purchases -
Tungsten/Copper Alloy Foil (Light Tight) (W 80/Cu20) Formula: W 80/Cu20
Thickness: 3mm
Length 1: 100mm
Length 2: 100mm
UOM Code: 473-210-07
eachStarting at £218.76
Discounts applied for volume purchases -
6-4 Plate Titanium Foil (Light Tight) Grade: 6-4 Plate
Formula: Ti
Thickness: 25mm
Length 1: 278mm
Length 2: 278mm
CAS Number: 7440-32-6
UOM Code: 929-338-86
eachStarting at £0.00
Discounts applied for volume purchases -
Selenium Foil (Light Tight) Formula: Se
Percentage Purity: 99.95%
Thickness: 3mm
Length 1: 25mm
Length 2: 25mm
CAS Number: 7782-49-2
UOM Code: 663-952-12
eachStarting at £882.37
Discounts applied for volume purchases -
Tin/Lead/Silver Alloy Foil (Light Tight) (Sn62/Pb36/Ag2) Formula: Sn62/Pb36/Ag2
Temper: As Rolled
Thickness: 0.5mm
Length 1: 15mm
Length 2: 15mm
UOM Code: 986-630-91
eachStarting at £178.11
Discounts applied for volume purchases
