| Platinum | |
| Electrons per shell | 2,8,18,32,17,1 |
| Electron Configuration | [Xe] 4f14 5d9 6s1 ![]() |
| Ground state | 3D3 |
| Atomic Volume | 9.09 cm3 mol-1 |
| Electronegativity | 2.28 |
| Magnetic ordering | Paramagnetic |
| Mass magnetic susceptibility | 1.22 x 10-8 |
| Molar magnetic susceptibility | 2.38 x 10-9 |
| Speed of sound | 2800 m s-1 |
Thermal Properties |
|
| Enthalpy of Atomization | 565 kJ mol-1 @25°C |
| Enthalpy of Fusion | 19.7 kJ mol-1 |
| Enthalpy of Vaporisation | 469 kJ mol-1 |
| Heat Capacity | 25.86 J mol-1 K-1 |
| Thermal Conductivity | 71.6 W m-1 K-1 |
| Thermal Expansion | 8.8 μm m-1 K-1 |
| Critcal Temperature | 0 K (0°C) |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Hardness |
|
| Brinell hardness | 392 MPa |
| Mohs hardness | 3.5 |
| Vickers hardness | 549 MPa |
Elastic Properties |
|
| Bulk modulus | 230 GPa |
| Poisson ratio | 0.38 |
| Shear modulus | 61 GPa |
| Young's modulus | 168 GPa |
Electrical Properties |
|
| Electrical resistivity | 1.06 x 10-7 Ω m |
| Electrical conductivity | 0.0966 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 1.8197 g Ah-1 |
| Electron Work Function | 5.65 eV |
| Valence Electron Potential (-eV) | 92.2 |
| Ionization Potential | |
| 9 | |
| 18.563 | |
| Incompatibilities | Aluminium, acetone (CH3COCH3), arsenic, ethane (C2H6), hydrazine (N2H4), hydrogen peroxide (H2O2), lithium, phosphorus, selenium, tellurium, various fluorides. |
Flammability |
|
Energy Levels |
|
| 66.832 KeV | |
| 65.112 KeV | |
| 75.748 KeV | |
| 76.0785 KeV | |
| 75.8301 KeV | |
| 9.4423 KeV | |
| 9.3618 KeV | |
| 11.0707 KeV | |
| 11.2505 KeV | |
| 11.232 KeV | |
| 10.8526 KeV | |
| 12.942 KeV | |
| 13.2682 KeV | |
| 9.971 KeV | |
| 8.2664 KeV | |
Atomic Radii |
|
| 135 pm | |
| 177 pm | |
| 128 pm | |
| 175 pm | |
| 110 pm | |
| 138.5 pm | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 2 | IVSQ | 0.74 | 0.6 | |
| VI | 0.94 | 0.8 | A | |
| 4 | VI | 0.765 | 0.625 | R |
| 5 | VI | 0.71 | 0.57 | ER |
| 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 |
|
| Pt+4 | |
| Pt0, Pt+2, Pt+5, Pt+6 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 870 | |
| 1791 | |
| 2800 | |
| 3900 | |
| 5300 | |
| 7200 | |
| 8900 | |
| 10500 | |
| 12300 | |
| 14100 | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 2330 | (2550) | 2815 | 3143 | 3556 | 4094 |
Crystal Structure |
|
| Cubic close packed | |
![]() |
a = 392.42 pm |
| b = 392.42 pm | |
| c = 392.42 pm | |
| α = 90° | |
| β = 90° | |
| γ = 90° | |