| Tungsten | |
| Electrons per shell | 2,8,18,32,12,2 |
| Electron Configuration | [Xe] 4f14 5d4 6s2 ![]() |
| Ground state | 5D0 |
| Atomic Volume | 9.53 cm3 mol-1 |
| Electronegativity | 2.36 |
| Magnetic ordering | No data |
| Mass magnetic susceptibility | 3.9 x 10-9 |
| Molar magnetic susceptibility | 7.17 x 10-10 |
| Speed of sound | 4620 m s-1 |
Thermal Properties |
|
| Enthalpy of Atomization | 837 kJ mol-1 @25°C |
| Enthalpy of Fusion | 35.2 kJ mol-1 |
| Enthalpy of Vaporisation | 824.2 kJ mol-1 |
| Heat Capacity | 24.27 J mol-1 K-1 |
| Thermal Conductivity | 173 W m-1 K-1 |
| Thermal Expansion | 4.5 μm m-1 K-1 |
| Critcal Temperature | No data. |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Hardness |
|
| Brinell hardness | 2570 MPa |
| Mohs hardness | 7.5 |
| Vickers hardness | 3430 MPa |
Elastic Properties |
|
| Bulk modulus | 310 GPa |
| Poisson ratio | 0.28 |
| Shear modulus | 161 GPa |
| Young's modulus | 411 GPa |
Electrical Properties |
|
| Electrical resistivity | 5 x 10-8 Ω m |
| Electrical conductivity | 0.189 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 1.1432 g Ah-1 |
| Electron Work Function | 4.55 eV |
| Valence Electron Potential (-eV) | 140 |
| Ionization Potential | |
| 7.98 | |
| Incompatibilities | Bromine trifluoride (BrF3), chlorine trifluoride (ClF3), fluorine, iodine pentafluoride (IF5). |
Flammability |
|
Energy Levels |
|
| 59.31824 KeV | |
| 57.9817 KeV | |
| 67.2443 KeV | |
| 68.2209 KeV | |
| 67.1623 KeV | |
| 8.3976 KeV | |
| 8.3352 KeV | |
| 9.67235 KeV | |
| 9.9615 KeV | |
| 9.8173 KeV | |
| 9.5246 KeV | |
| 11.2859 KeV | |
| 11.6069 KeV | |
| 8.722 KeV | |
| 7.3844 KeV | |
Atomic Radii |
|
| 135 pm | |
| 193 pm | |
| 146 pm | |
| No data. | |
| 115 pm | |
| 139 pm | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 4 | VI | 0.8 | 0.66 | RM |
| 5 | VI | 0.76 | 0.62 | R |
| 6 | IV | 0.56 | 0.42 | * |
| V | 0.65 | 0.51 | ||
| VI | 0.74 | 0.6 | * | |
| R, From r3 vs V plots. |
| C, Calculated from bond length - bond strength equations. |
| E, Estimated. |
| *, Most Reliable. |
| M, From Metallic Oxides. |
| A, Ahrens (1952) Ionic radius. |
| P, Pauling's (1960) Crystal Radius. |
Oxidation States |
|
| W-4, W-2, W-1, W0, W+2, W+3, W+4, W+5, W+6 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 770 | |
| 1700 | |
| 2300 | |
| 3400 | |
| 4600 | |
| 5900 | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 3477 | 3773 | 4137 | 4579 | 5127 | 5823 |
Crystal Structure |
|
| Body centred cubic | |
![]() |
a = 316.52 pm |
| b = 316.52 pm | |
| c = 316.52 pm | |
| α = 90° | |
| β = 90° | |
| γ = 90° | |