镧,块, La, 25mm Max. Lump Size, 2N
| 品牌: | Goodfellow | | 纯度含量: | 99.0% | | 产地: | 英国 |
产品介绍
Supplied in 100g bottles only. | 订货号 | 包装规格 | | Weight | | 637-787-86 | 20g | | 023-738-69 | 50g | | 697-634-61 | 100g | | 832-256-07 | 250g | | 549-852-13 | 500g | | 596-729-07 | 1000g | | 661-997-46 | 1500g |
产品参数 | Maximum Lump Size[] | 25mm | | Purity[纯度] | 99.0% | | Weight[重量] | 20g - 2000g | | Physical Properties(物理性质) | | Boiling point ( C ) | 3457 | | Density ( g cm⁻³ ) | 6.174 @20℃ | | Atomic Properties(原子属性) | | Atomic number | 57 | | Atomic weight ( amu ) | 138.90550 | | Crystal structure | Hexagonal Close Packed/Face Centred Cubic | | Electronic structure | Xe5d¹6s² | | Ionisation potential ( No./eV ) | 3 / 19.18 | | Ionisation potential ( No./eV ) | 1 / 5.58 | | Ionisation potential ( No./eV ) | 2 / 11.06 | | Natural isotope distribution ( Mass No./% ) | 139 / 99.91 | | Natural isotope distribution ( Mass No./% ) | 138 / 0.09 | | Photo-electric work function ( eV ) | 3.50 | | Thermal neutron absorption cross-section ( Barns ) | 8.9000 | | Valences shown | 3 | | Electrical Properties(电气特性) | | Electrical resistivity ( μOhmcm ) | 57@20℃ | | Superconductivity critical temperature ( K ) | 4.8800 | | Temperature coefficient ( K⁻¹ ) | 0.00218 @0-100℃ | | Mechanical Properties(机械性能) | | Bulk modulus ( GPa ) ( Polycrystalline ) | 24.8 | | Hardness - Vickers ( kgf mm⁻² ) ( Polycrystalline ) | 40 | | Material condition | Polycrystalline | | Poisson's ratio ( Polycrystalline ) | 0.280 | | Tensile modulus ( GPa ) ( Polycrystalline ) | 37.90 | | Tensile strength ( MPa ) ( Polycrystalline ) | 131.00 | | Yield strength ( MPa ) ( Polycrystalline ) | 124.0 | | Thermal Properties(热性能) | | Coefficient of thermal expansion ( x10⁻⁶ K⁻¹ ) | 4.900 @0-100℃ | | Latent heat of evaporation ( J g⁻¹ ) | 2897 | | Latent heat of fusion ( J g⁻¹ ) | 60.20 | | Melting point ( C ) | 921.00 | | Specific heat ( J K⁻¹ kg⁻¹ ) | 197.0 @25℃ | | Thermal conductivity ( W m⁻¹ K⁻¹ ) | 13.40 @0-100℃ |
易燃 与火焰接触后点燃的化学品，或与水接触后逸出高度易燃气体的化学品。
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