Lead Foil (Light Tight)

Formula: Pb

Form: Foil (Light Tight)

Material: Lead

CAS Number: 7439-92-1

Commodity: Metals

Light Tight: Light Tight

Hazard Pictogram: GHS08

Goodfellow provides light-tight lead foil with a maximum purity of 99.999% (5N). This specialized form combines lead's high density and excellent radiation shielding capabilities with light-blocking properties. Despite restrictions due to toxicity concerns, it remains crucial in certain industries and research fields. It's extensively used in radiation shielding for medical and nuclear applications. In scientific research, it's vital for experiments requiring both radiation protection and light isolation, such as in particle physics and advanced imaging technologies. The foil's high purity ensures minimal interference in sensitive measurements, making it ideal for use in specialized nuclear research and the development of next-generation radiation detection systems.

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Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	82
Crystal structure	Face centred cubic
Electronic structure	Xe 4f¹⁴ 5d¹⁰ 6s² 6p²
Valences shown	2, 4
Atomic weight( amu )	207.2
Thermal neutron absorption cross-section( Barns )	0.18
Photo-electric work function( eV )	4
Natural isotope distribution( Mass No./% )	207/ 22.1
Natural isotope distribution( Mass No./% )	208/ 52.4
Natural isotope distribution( Mass No./% )	206/ 24.1
Natural isotope distribution( Mass No./% )	204/ 1.4
Atomic radius - Goldschmidt( nm )	0.175
Ionisation potential( No./eV )	5/ 68.8
Ionisation potential( No./eV )	3/ 31.9
Ionisation potential( No./eV )	4/ 42.3
Ionisation potential( No./eV )	2/ 15.03
Ionisation potential( No./eV )	1/ 7.42

Mechanical Properties

Element	Value
Hardness - Mohs	1.5
Material condition	Polycrystalline
Material condition	Sand cast
Poisson's ratio	0.44
Poisson's ratio	0.44
Bulk modulus( GPa )	45.8
Bulk modulus( GPa )	45.8
Tensile modulus( GPa )	16.1
Tensile modulus( GPa )	16.1
Tensile strength( MPa )	12
Yield strength( MPa )	5.5

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	20.6@20@20°C
Superconductivity critical temperature( K )	7.196
Temperature coefficient( K⁻¹ )	0.0042@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.44

Physical Properties

Element	Value
Boiling point( C )	1740
Density( gcm⁻³ )	11.35@20

Thermal Properties

Element	Value
Melting point( C )	327.5
Latent heat of evaporation( J g⁻¹ )	862
Latent heat of fusion( J g⁻¹ )	23.2
Specific heat( J K⁻¹ kg⁻¹ )	159@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	35.3@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	29@0-100°C

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Lead Foil (Light Tight)

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Material Properties for Metals