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Formula: Sb
Form: Foil (Light Tight)
Material: Antimony
CAS Number: 7440-36-0
Commodity: Metals
Light Tight: Light Tight
Antimony Foil (Light Tight) possesses a unique combination of high optical reflectivity, programmable optical states, and structural stability. Its light-tight quality ensures complete opacity, blocking all external light transmission, which is critical for applications requiring strict optical isolation. Key industries utilizing this foil include photonics, optoelectronics, and materials research. Within these sectors, it supports technologies such as high-speed photonic switches, optical data storage media, and light-controlled metamaterials. The capacity to undergo rapid, reversible phase transitions—on sub-picosecond timescales—makes it particularly valuable for advanced neuromorphic computing prototypes and high-bandwidth optical communication devices. Antimony Foil (Light Tight) is increasingly significant in research aiming to merge material science with next-generation optoelectronic architectures, offering a simple yet powerful platform for both fundamental investigations and scalable industrial solutions.

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Material Properties for Metals

Atomic Properties
Element Value
Atomic number 51
Crystal structure Rhombohedral
Electronic structure Kr 4d¹⁰ 5s² 5p³
Valences shown -3,0,3,5
Atomic weight( amu ) 121.75
Thermal neutron absorption cross-section( Barns ) 5
Photo-electric work function( eV ) 4.1
Natural isotope distribution( Mass No./% ) 121/ 57.3
Natural isotope distribution( Mass No./% ) 123/ 42.7
Atomic radius - Goldschmidt( nm ) 0.161
Ionisation potential( No./eV ) 1/ 8.64
Ionisation potential( No./eV ) 3/ 25.3
Ionisation potential( No./eV ) 2/ 16.53
Ionisation potential( No./eV ) 5/ 56.0
Ionisation potential( No./eV ) 4/ 44.2
Ionisation potential( No./eV ) 6/ 108
Mechanical Properties
Element Value
Hardness - Mohs 3-3.3
Material condition Polycrystalline
Poisson's ratio 0.25-0.33
Bulk modulus( GPa ) 42
Tensile modulus( GPa ) 54.7
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 40.1@20@20°C
Temperature coefficient( K⁻¹ ) 0.0051@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 4.89
Physical Properties
Element Value
Boiling point( C ) 1750
Density( gcm⁻³ ) 6.68@20
Thermal Properties
Element Value
Melting point( C ) 630.7
Latent heat of evaporation( J g⁻¹ ) 1370
Latent heat of fusion( J g⁻¹ ) 163
Specific heat( J K⁻¹ kg⁻¹ ) 205@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 24.4@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 9@0-100°C

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