ISSN:
1572-8927
Schlagwort(e):
Lanthanide nitrates
;
hydrates
;
solubilities
;
activities
;
solvation energies
;
phase transitions
;
congruent melting points
;
specific solvation
;
metastable equilibria
;
tetrad effect
;
double-double effect
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract The thermodynamic properties of saturated aqueous lanthanide nitrate solutions were determined using recently published critically evaluated solubility and activity data. The variation of the thermodynamic functions and congruent melting points as a function of atomic number are interpreted in terms of changes in inner sphere coordination number in both the solid hexahydrates and in the aquo ions, and in terms of the double-double effect. Inconsistencies in experimental solubility data are generally caused by uncertainties in solid phase composition which is shown to be due to the very small Gibbs energies accompanying transitions from stable to metastable systems differing in the number of hydrating water molecules.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00646979
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