Yttrium and Rare Earth Element Complexation by Chloride Ions at 25°C

Authors

Yu-Ran Luo, University of South Florida
Robert H. Byrne, University of South FloridaFollow

Document Type

Article

Publication Date

2001

Keywords

rare earth elements, complexation, chloride, stability constants, ionic strength, lanthanide, yttrium, MIDA

Digital Object Identifier (DOI)

https://doi.org/10.1023/A:1012292417793

Abstract

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)=logCI⁡β10(M)−3.066μ0.5/(1+1.727μ0.5)">logCIβ1(M)=logCIβ01(M)−3.066μ0.5/(1+1.727μ0.5)logCIβ1(M)=logCI⁡β10(M)−3.066μ0.5/(1+1.727μ0.5)

where _Clβ₁(M) = [MCl²⁺][M³⁺]⁻¹[Cl⁻¹]⁻¹ and log_Clβ₁ ^o(M) represents the MCl²⁺ formation constant for all YREE at zero ionic strength: log_Clβ₁ ^o = 0.65 ± 0.05.

Was this content written or created while at USF?

Yes

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.
https://digitalcommons.usf.edu/msc_facpub/1733