|
|
| Indium | |
| Electron Configuration | 2,8,18,18,3 |
| Electron Configuration | [Kr] 4d10 5s2 5p1 |
| Ground state | 2P°1/2 |
| Atomic Volume | 15.7 g/cm3 |
| Electronegativity | 1.78 |
| Magnetic ordering | No data |
| Mass magnetic susceptibility | -1.4 x 10-9 |
| Molar magnetic susceptibility | -1.61 x 10-10 |
| Speed of sound | 1215 m s-1 |
 Thermal Properties |
|
| Enthalpy of Atomization | 242.7 kJ mol-1 @25°C |
| Enthalpy of Fusion | 3.27 kJ mol-1 |
| Enthalpy of Vaporisation | 231.8 kJ mol-1 |
| Heat Capacity | 26.74 J mol-1 K-1 |
| Thermal Conductivity | 81.8 W m-1 K-1 |
| Thermal Expansion | 32.1 μm m-1 K-1 |
| Hardness |
|
| Brinell hardness | 8.83 MPa |
| Mohs hardness | 1.2 |
| Elastic Properties |
|
| Young's modulus | 11 GPa |
| Electrical Properties |
|
| Electrical resistivity | 8 x 10-8 Ω m |
| Electrical conductivity | No data. |
| Chemical Properties |
|
| Electrochemical Equivalent | 1.428 g Ah-1 |
| Electron Work Function | 4.12 eV |
| Valence Electron Potential (-eV) | 54 |
| Ionization Potential | |
 First
|
5.786 |
| Second
|
18.869 |
| Third
|
28.03 |
| Incompatibilities | Dinitrogen tetraoxide (N2O4), acetonitrile (CH3CN), mercury(II) bromide (at 662°F), sulfur (mixtures ignite when heated). |
| Flammability |
|
| Non-combustible solid (except as dust)
|
| Energy Levels |
|
| Kα1 (intensity 100) |
24.2097 KeV |
| Kα2 (intensity 50) |
24.002 KeV |
| Kβ1 (intensity 19) |
27.2759 KeV |
| Kβ2 (intensity 5) |
27.8572 KeV |
| Kβ3 (intensity 8.4) |
27.2332 KeV |
| Lα1 (intensity 100) |
3.28694 KeV |
| Lα2 (intensity 10) |
3.27929 KeV |
| Lβ1 (intensity 45) |
3.48721 KeV |
| Lβ2 (intensity 12.5) |
3.71381 KeV |
| Lβ3 (intensity 8) |
3.5713 KeV |
| Lβ4 (intensity 4) |
3.5342 KeV |
| Lγ1 (intensity 3.5) |
3.92081 KeV |
| Lγ2 (intensity 1) |
4.1612 KeV |
| Lγ3 (intensity 2) |
3.111 KeV |
| Ll (intensity 5) |
2.9018 KeV |
| Atomic Radii |
|
| Empirical
|
155 pm |
| Bohr Radius
|
156 pm |
| Covalent Radius
|
144 pm |
| Van der Waals
|
193 pm |
| Triple covalent
|
146 pm |
| Metallic
|
167 pm |
| Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 3 | IV | 0.76 | 0.62 | |
| VI | 0.94 | 0.8 | R* | |
| VIII | 1.06 | 0.92 | RC | |
| 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
|
In+3 |
| Other
|
In+1, In+2 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
558.3 |
| M+ - M2+ |
1820.6 |
| M2+ - M3+ |
2704 |
| M3+ - M4+ |
5200 |
| M4+ - M5+ |
7400 |
| M5+ - M6+ |
9500 |
| M6+ - M7+ |
11700 |
| M7+ - M8+ |
13900 |
| M8+ - M9+ |
17200 |
| M9+ - M10+ |
19700 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 1196 | 1325 | 1485 | 1690 | 1962 | 2340 |
| Crystal Structure |
|
| Structure
|
Tetragonal |
 |
a = 325.23 pm |
| b = 325.23 pm | |
| c = 494.61 pm | |
| α = 90° | |
| β = 90° | |
| γ = 90° | |