|
|
| Platinum | |
| Electron Configuration | 2,8,18,32,17,1 |
| Electron Configuration | [Xe] 4f14 5d9 6s1 |
| Ground state | 3D3 |
| Atomic Volume | 9.09 g/cm3 |
| 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 |
| 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 | No data. |
| Chemical Properties |
|
| Electrochemical Equivalent | 1.8197 g Ah-1 |
| Electron Work Function | 5.65 eV |
| Valence Electron Potential (-eV) | 92.2 |
| Ionization Potential | |
 First
|
9 |
| Second
|
18.563 |
| Incompatibilities | Aluminium, acetone (CH3COCH3), arsenic, ethane (C2H6), hydrazine (N2H4), hydrogen peroxide (H2O2), lithium, phosphorus, selenium, tellurium, various fluorides. |
| Flammability |
|
| Non-combustible solid (except as dust)
|
| Energy Levels |
|
| Kα1 (intensity 100) |
66.832 KeV |
| Kα2 (intensity 50) |
65.112 KeV |
| Kβ1 (intensity 26.6) |
75.748 KeV |
| Kβ2 (intensity 10.9) |
76.0785 KeV |
| Kβ3 (intensity 10.3) |
75.8301 KeV |
| Lα1 (intensity 100) |
9.4423 KeV |
| Lα2 (intensity 10) |
9.3618 KeV |
| Lβ1 (intensity 36) |
11.0707 KeV |
| Lβ2 (intensity 18.5) |
11.2505 KeV |
| Lβ3 (intensity 6) |
11.232 KeV |
| Lβ4 (intensity 4) |
10.8526 KeV |
| Lγ1 (intensity 7) |
12.942 KeV |
| Lγ2 (intensity 2.5) |
13.2682 KeV |
| Lγ3 (intensity 2) |
9.971 KeV |
| Ll (intensity 6) |
8.2664 KeV |
| Atomic Radii |
|
| Empirical
|
135 pm |
| Bohr Radius
|
177 pm |
| Covalent Radius
|
128 pm |
| Van der Waals
|
175 pm |
| Triple covalent
|
110 pm |
| Metallic
|
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 |
|
| Main
|
Pt+4 |
| Other
|
Pt0, Pt+2, Pt+5, Pt+6 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
870 |
| M+ - M2+ |
1791 |
| M2+ - M3+ |
2800 |
| M3+ - M4+ |
3900 |
| M4+ - M5+ |
5300 |
| M5+ - M6+ |
7200 |
| M6+ - M7+ |
8900 |
| M7+ - M8+ |
10500 |
| M8+ - M9+ |
12300 |
| M9+ - M10+ |
14100 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 2330 | (2550) | 2815 | 3143 | 3556 | 4094 |
| Crystal Structure |
|
| Structure
|
Cubic close packed |
 |
a = 392.42 pm |
| b = 392.42 pm | |
| c = 392.42 pm | |
| α = 90° | |
| β = 90° | |
| γ = 90° | |