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The stability constants lgKML and the energy parameters of complexation (enthalpy ΔH and entropy ΔS) for Ln3+ with EDTA complexes [89]
| Ln3+ | lgKML | ΔH, kJ/mol | ΔS, kJ/mol |
|---|---|---|---|
| La3+ | 15.5 | − 12.1 | 255 |
| Ce3+ | 16.0 | − 12.1 | 264 |
| Pr3+ | 16.4 | − 13.4 | 268 |
| Nd3+ | 16.6 | − 15.1 | 268 |
| Sm3+ | 17.1 | − 14.2 | 281 |
| Eu3+ | 17.4 | − 10.9 | 297 |
| Gd3+ | 17.4 | − 7.1 | 310 |
| Tb3+ | 17.9 | − 4.6 | 327 |
| Dy3+ | 18.3 | − 5.0 | 335 |
| Ho3+ | 18.6 | − 5.9 | 335 |
| Er3+ | 18.9 | − 7.1 | 335 |
| Tm3+ | 19.3 | − 8.0 | 343 |
| Yb3+ | 19.5 | − 9.6 | 340 |
| Lu3+ | 19.8 | − 10.5 | 343 |
