Iridium Foil (Light Tight)

Formula: Ir

Form: Foil (Light Tight)

Material: Iridium

CAS Number: 7439-88-5

Commodity: Precious Metals

Purity: 99.9%

Temper: As Rolled

Light Tight: Light Tight

Iridium Foil (Light Tight) is part of our range of high-purity foil products. This foil is notable for its extreme corrosion resistance and high-temperature durability. Iridium is one of the densest elements and has excellent thermal conductivity. Which makes this foil ideal for applications like crucibles, thermocouples and reflective coatings for extreme environments. With 26 variations to choose from, our Iridium Foil (Light Tight) range can accommodate needs ranging from ultra-thin to robust thicknesses across manufacturing and research.

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Material Properties for Precious Metals

Atomic Properties

Element	Value
Atomic number	77
Crystal structure	Face centred cubic
Electronic structure	Xe 4f¹⁴ 5d⁷ 6s²
Valences shown	3, 4
Atomic weight( amu )	192.22
Thermal neutron absorption cross-section( Barns )	425
Photo-electric work function( eV )	4.6
Natural isotope distribution( Mass No./% )	191/ 37.3
Natural isotope distribution( Mass No./% )	193/ 62.7
Atomic radius - Goldschmidt( nm )	0.135

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.26
Poisson's ratio	0.26
Bulk modulus( GPa )	371
Bulk modulus( GPa )	371
Tensile modulus( GPa )	528
Tensile modulus( GPa )	528
Hardness - Vickers( kgf mm⁻² )	650
Hardness - Vickers( kgf mm⁻² )	200-300
Tensile strength( MPa )	550-1100
Tensile strength( MPa )	1200

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	5.1@20@20°C
Superconductivity critical temperature( K )	0.11
Temperature coefficient( K⁻¹ )	0.0045@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.65

Physical Properties

Element	Value
Boiling point( C )	4130
Density( gcm⁻³ )	22.4@20°C

Thermal Properties

Element	Value
Melting point( C )	2410
Latent heat of evaporation( J g⁻¹ )	3186
Latent heat of fusion( J g⁻¹ )	135
Specific heat( J K⁻¹ kg⁻¹ )	133@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	147@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	6.8@0-100°C

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Iridium Foil (Light Tight)

Material Properties for Precious Metals