Cation-cation complexes of PuO2+ and NpO2+ with Th4+ and UO22+

N. J. Stoyer; D.C. Hoffman; R.J. Silva

doi:10.1524/ract.2000.88.5.279

Article

Cation-cation complexes of PuO₂⁺ and NpO₂⁺ with Th⁴⁺ and UO₂²⁺

N. J. Stoyer , D.C. Hoffman and R.J. Silva

Published/Copyright: September 25, 2009

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From the journal Radiochimica Acta Volume 88 Issue 5

Cation-cation complexes of NpO₂⁺ and PuO₂⁺ with UO₂²⁺ and Th⁴⁺ were studied using laser-induced photoacoustic spectroscopy (LIPAS). An equilibrium constant of 2.4±0.2 M^-1 was measured at an ionic strength of 6.0 M for the NpO₂⁺ · UO₂²⁺ complex which is in good agreement with previous measurements using conventional absorption spectroscopy and Raman spectroscopy. Equilibrium constants of 1.8±0.9 and 2.2±1.5 M^-1 were measured for NpO₂⁺ · Th⁴⁺ and PuO₂⁺ · UO₂²⁺ complexes at an ionic strength of 6.0 M, respectively. This is the first time that LIPAS has been used to study cation-cation complexes and the first time that the PuO₂⁺ · UO₂²⁺ cation-cation complex has been reported.

Published Online: 2009-9-25

Published in Print: 2000-5-1

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https://doi.org/10.1524/ract.2000.88.5.279