Yttrium and Rare Earth Element Complexation by Chloride Ions at 25°C
rare earth elements, complexation, chloride, stability constants, ionic strength, lanthanide, yttrium, MIDA
Digital Object Identifier (DOI)
Formation constants for yttrium and rare earth element (YREE) chloride complexation have been measured at 25°C by examining the influence of medium (NaClO4 and NaCl) on YREE complexation by fluoride ions and methyliminodiacetate (MIDA). YREE chloride complexation constants Clβ1(M) obtained in this work using dissimilar procedures are in good agreement and indicate that, at constant temperature and ionic strength, Clβ1(M) does not vary significantly across the fifteen-member series of elements. The ionic strength μ dependence of YREE chloride formation constants between 0 and 6 molar ionic strength can be written, for all YREE, as logCIβ1(M)=logCIβ10(M)−3.066μ0.5/(1+1.727μ0.5)">logCIβ1(M)=logCIβ01(M)−3.066μ0.5/(1+1.727μ0.5)logCIβ1(M)=logCIβ10(M)−3.066μ0.5/(1+1.727μ0.5)
where Clβ1(M) = [MCl2+][M3+]−1[Cl−1]−1 and logClβ1 o(M) represents the MCl2+ formation constant for all YREE at zero ionic strength: logClβ1 o = 0.65 ± 0.05.
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Citation / Publisher Attribution
Journal of Solution Chemistry, v. 30, p. 837-845
Scholar Commons Citation
Luo, Yu-Ran and Byrne, Robert H., "Yttrium and Rare Earth Element Complexation by Chloride Ions at 25°C" (2001). Marine Science Faculty Publications. 1733.