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Formula: Ba
Form: Pellet/Lump
Material: Barium
CAS Number: 7440-39-3
Commodity: Metals
Purity: 99%
Maximum Lump Size: 25mm
Hazard Pictogram: GHS02
Barium pellets are part of Goodfellow's range of pellets for scientific research and industrial applications. Barium has a high density and low melting point. The pellets can be melted and cast into custom shapes. They also have high electrical conductivity and are used as getter material in vacuum tubes. The purity and consistent size of the barium pellets from Goodfellow make them ideal for repeatable experiments in labs. Their properties also make barium pellets useful for radiation shielding and as alloying elements.
Technical Data Sheet Safety Data Sheet Tolerance Properties

Flammable

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Tolerances

Pellet/Lump
Maximum Lump Size Nominal

Material Properties for Metals

Atomic Properties
Element Value
Atomic number 56
Crystal structure Body centred cubic
Electronic structure Xe 6s²
Valences shown 2
Atomic weight( amu ) 137.33
Thermal neutron absorption cross-section( Barns ) 1.2
Photo-electric work function( eV ) 2.5
Natural isotope distribution( Mass No./% ) 135/ 6.6
Natural isotope distribution( Mass No./% ) 130/ 0.1
Natural isotope distribution( Mass No./% ) 136/ 7.9
Natural isotope distribution( Mass No./% ) 138/ 71.7
Natural isotope distribution( Mass No./% ) 132/ 0.1
Natural isotope distribution( Mass No./% ) 137/ 11.2
Natural isotope distribution( Mass No./% ) 134/ 2.4
Atomic radius - Goldschmidt( nm ) 0.224
Ionisation potential( No./eV ) 1/ 5.21
Ionisation potential( No./eV ) 2/ 10.0
Mechanical Properties
Element Value
Material condition Polycrystalline
Poisson's ratio 0.28
Bulk modulus( GPa ) 9.7
Tensile modulus( GPa ) 12.8
Physical Properties
Element Value
Boiling point( C ) 1640
Density( gcm⁻³ ) 3.5@20°C
Thermal Properties
Element Value
Melting point( C ) 725
Latent heat of evaporation( J g⁻¹ ) 1100
Latent heat of fusion( J g⁻¹ ) 55.8
Specific heat( J K⁻¹ kg⁻¹ ) 192@25°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 18@0-100°C

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