Abstract

The solubility of all the lanthanide ethylsulphates (except for Pm) was measured at 15–45°C. The results have been used to estimate the variations of the thermodynamic functions of crystallization along the series. It is found that both the free energy and the enthalpy of crystallization pass through a minimum in the NdSm region. However, when the respective functions for complex formation of isostructural lanthanide complexes are subtracted from the crystallization functions, a monotonic variation of the ΔG° and ΔH° functions so obtained is observed.

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