|
|
| Strontium | |
| Electron Configuration | 2,8,18,8,2 |
| Electron Configuration | [Kr] 5s2 |
| Ground state | 1S0 |
| Atomic Volume | 33.7 g/cm3 |
| Electronegativity | 0.95 |
| Magnetic ordering | Paramagnetic |
| Mass magnetic susceptibility | -2.5 x 10-9 |
| Molar magnetic susceptibility | -2.19 x 10-10 |
 Thermal Properties |
|
| Enthalpy of Atomization | 163.2 kJ mol-1 @25°C |
| Enthalpy of Fusion | 9.16 kJ mol-1 |
| Enthalpy of Vaporisation | 154.4 kJ mol-1 |
| Heat Capacity | 26.4 J mol-1 K-1 |
| Thermal Conductivity | 35.4 W m-1 K-1 |
| Thermal Expansion | 22.5 μm m-1 K-1 |
| Hardness |
|
| Mohs hardness | 1.5 |
| Elastic Properties |
|
| Poisson ratio | 0.28 |
| Shear modulus | 6.1 GPa |
| Electrical Properties |
|
| Electrical resistivity | 1.3 x 10-7 Ω m |
| Electrical conductivity | No data. |
| Chemical Properties |
|
| Electrochemical Equivalent | 1.635 g Ah-1 |
| Electron Work Function | 2.59 eV |
| Valence Electron Potential (-eV) | 25.7 |
| Ionization Potential | |
 First
|
5.695 |
| Second
|
11.03 |
| Third
|
43.6 |
| Energy Levels |
|
| Kα1 (intensity 100) |
14.165 KeV |
| Kα2 (intensity 50) |
14.0979 KeV |
| Kβ1 (intensity 16) |
15.8357 KeV |
| Kβ2 (intensity 2.8) |
16.0835 KeV |
| Kβ3 (intensity 7.7) |
15.8226 KeV |
| Lα1 (intensity 100) |
1.80656 KeV |
| Lα2 (intensity 10) |
1.80474 KeV |
| Lβ1 (intensity 45) |
1.87172 KeV |
| Lβ3 (intensity 3.9) |
1.9478 KeV |
| Lβ4 (intensity 0.2) |
1.9361 KeV |
| Lγ3 (intensity 3) |
1.649 KeV |
| Ll (intensity 4) |
1.582 KeV |
| Atomic Radii |
|
| Empirical
|
200 pm |
| Bohr Radius
|
219 pm |
| Covalent Radius
|
192 pm |
| Van der Waals
|
No data. |
| Triple covalent
|
139 pm |
| Metallic
|
215 pm |
| Oxidation States |
|
| Main
|
Sr+2 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
549.5 |
| M+ - M2+ |
1064.2 |
| M2+ - M3+ |
4210 |
| M3+ - M4+ |
5500 |
| M4+ - M5+ |
6910 |
| M5+ - M6+ |
8760 |
| M6+ - M7+ |
10200 |
| M7+ - M8+ |
11800 |
| M8+ - M9+ |
15600 |
| M9+ - M10+ |
17100 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 796 | 882 | 990 | 1139 | 1345 | 1646 |
| Crystal Structure |
|
| Structure
|
Cubic close packed |
 |
a = 608.49 pm |
| b = 608.49 pm | |
| c = 608.49 pm | |
| α = 90° | |
| β = 90° | |
| γ = 90° | |