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Table 4
Some physical data of the main important elements of meteorites compositions.
| Sublimation | Fusion | Vaporization | 1st ionization | |
|---|---|---|---|---|
| enthalpy | temperature | temperature | potential | |
| (kJ mol−1) | (K) | (K) | (eV) | |
| H | 218.00 | – | – | 13.6 |
| C | 716.68 | – | 4100 | 11.3 |
| N | 472.68 | – | – | 14.5 |
| O | 249.18 | – | – | 13.6 |
| Na | 107.30 | – | 1171 | 5.1 |
| Mg | 147.10 | 923 | 1366 | 7.6 |
| Al | 329.70 | 933 | 2791 | 6.0 |
| Si | 450.00 | 1685 | 3505 | 8.2 |
| K | 89.00 | 336 | 1040 | 4.3 |
| Ca | 177.8 | 1115 | 1774 | 6.1 |
| Cr | 397.48 | 2130 | 2952 | 6.8 |
| Mn | 283.26 | 1519 | 2235 | 7.4 |
| Fe | 415.47 | 1809 | 3133 | 7.9 |
Notes. Data from the NIST database. Thermodynamical parameter: http://webbook.nist.gov/chemistry/form-ser/ and ionization potentials: https://www.nist.gov/pml/atomic-spectra-database.
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