| High Purity[纯度] |
99.999% |
| Length[长度] |
175mm |
| Product Shape[形状] |
Semicircular Cross Section, Rounded Ends |
| Side Length (Of Longer Side)[边长(长边)] |
40mm |
| Side Length[边长] |
20mm |
| Typical Analysis(典型分析) |
| Ag |
1 PPM |
| Bi |
1 PPM |
| Cd |
<1 PPM |
| Cu |
1 PPM |
| Fe |
<1 PPM |
| Ni |
<1 PPM |
| Sn |
<1 PPM |
| Thermal Properties(热性能) |
| Coefficient of thermal expansion ( x10?? K?? ) |
29.000 @0-100℃ |
| Latent heat of evaporation ( J g?? ) |
862 |
| Latent heat of fusion ( J g?? ) |
23.20 |
| Melting point ( C ) |
327.50 |
| Specific heat ( J K?? kg?? ) |
159.0 @25℃ |
| Thermal conductivity ( W m?? K?? ) |
35.30 @0-100℃ |
| Atomic Properties(原子属性) |
| Atomic number |
82 |
| Atomic weight ( amu ) |
207.20000 |
| Crystal structure |
Face Centred Cubic |
| Electronic structure |
Xe4f??5d??6s?6p? |
| Ionisation potential ( No./eV ) |
5 / 68.8 |
| Ionisation potential ( No./eV ) |
3 / 31.9 |
| Ionisation potential ( No./eV ) |
4 / 42.3 |
| Ionisation potential ( No./eV ) |
2 / 15.03 |
| Ionisation potential ( No./eV ) |
1 / 7.42 |
| Natural isotope distribution ( Mass No./% ) |
207 / 22.1 |
| Natural isotope distribution ( Mass No./% ) |
208 / 52.4 |
| Natural isotope distribution ( Mass No./% ) |
206 / 24.1 |
| Natural isotope distribution ( Mass No./% ) |
204 / 1.4 |
| Photo-electric work function ( eV ) |
4.00 |
| Thermal neutron absorption cross-section ( Barns ) |
0.1800 |
| Valences shown |
2 , 4 |
| Electrical Properties(电气特性) |
| Electrical resistivity ( μOhmcm ) |
20.6@20℃ |
| Superconductivity critical temperature ( K ) |
7.1960 |
| Temperature coefficient ( K?? ) |
0.00420 @0-100℃ |
| Thermal emf against Pt (cold 0C - hot 100C) ( mV ) |
0.44 |
| Mechanical Properties(机械性能) |
| Bulk modulus ( GPa ) ( Polycrystalline ) |
45.8 |
| Bulk modulus ( GPa ) ( Sand cast ) |
45.8 |
| Hardness - Mohs ( Sand cast ) |
1.50 |
| Material condition |
Polycrystalline |
| Material condition |
Sand Cast |
| Poisson's ratio ( Polycrystalline ) |
0.440 |
| Poisson's ratio ( Sand cast ) |
0.440 |
| Tensile modulus ( GPa ) ( Polycrystalline ) |
16.10 |
| Tensile modulus ( GPa ) ( Sand cast ) |
16.10 |
| Tensile strength ( MPa ) ( Sand cast ) |
12.00 |
| Yield strength ( MPa ) ( Sand cast ) |
5.5 |
| Physical Properties(物理性质) |
| Boiling point ( C ) |
1740 |
| Density ( g cm?? ) |
11.350 @20 |
