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Formula: La
Form: Rod
Material: Lanthanum
CAS Number: 7439-91-0
Commodity: Metals
Diameter:
6.35mm
Production Method:
Cast
Hazard Pictogram:
GHS02
Lanthanum Rods are a new offering from our ever-expanding range of metal rods. Available in 10 variations, they’re composed of lanthanum, a silvery white metallic element valued for its unique magnetic, optical and electrical properties. With high ductility and malleability, these rods are used in research settings investigating superconductivity, as well as in the manufacturing of optical instruments and camera/telescope lenses. The variations in size and composition we offer make Lanthanum Rods suitable for exploring a wide breadth of experimental and industrial applications.
Flammable
Tolerances
Rod
| Diameter | =<10mm | ±10% |
|---|---|---|
| Diameter | >10mm | ±5% |
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 57 |
| Crystal structure | Hexagonal close packed/Face centred cubic |
| Electronic structure | Xe 5d¹ 6s² |
| Valences shown | 3 |
| Atomic weight( amu ) | 138.9055 |
| Thermal neutron absorption cross-section( Barns ) | 8.9 |
| Photo-electric work function( eV ) | 3.5 |
| Natural isotope distribution( Mass No./% ) | 139/ 99.91 |
| Natural isotope distribution( Mass No./% ) | 138/ 0.09 |
| Atomic radius - Goldschmidt( nm ) | 0.187 |
| Ionisation potential( No./eV ) | 3/ 19.18 |
| Ionisation potential( No./eV ) | 1/ 5.58 |
| Ionisation potential( No./eV ) | 2/ 11.06 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Polycrystalline |
| Poisson's ratio | 0.28 |
| Bulk modulus( GPa ) | 24.8 |
| Tensile modulus( GPa ) | 37.9 |
| Hardness - Vickers( kgf mm⁻² ) | 40 |
| Tensile strength( MPa ) | 131 |
| Yield strength( MPa ) | 124 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 57@20@20°C |
| Superconductivity critical temperature( K ) | 4.88 |
| Temperature coefficient( K⁻¹ ) | 0.00218@0-100°C |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 3457 |
| Density( gcm⁻³ ) | 6.174@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 921 |
| Latent heat of evaporation( J g⁻¹ ) | 2897 |
| Latent heat of fusion( J g⁻¹ ) | 60.2 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 197@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 13.4@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 4.9@0-100°C |