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The hydrolysis of actinium

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Abstract

The first hydrolysis constant (pK1h = 9.4) of Ac3+ cations has been determined using 228Ac radiotracer. The pK1h value of Ac3+is compared to the pK1h values of other Group 3 cations. It is shown that, in contrast to the Group 2, 11, 12 and 13, the heaviest member of the Group 3 Ac3+ hydrolyses at less extent than its lighter homologs. The linearity of the log K1h-1/r i (where r i is the ionic radius) function indicates that the electrostatic model of hydrolysis describes well the hydrolysis of Group 3 cations.

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Authors and Affiliations

  1. Department of Radiochemistry, Institute of Nuclear Chemistry and Technology Dorodna 16, 03-195, Warsaw, Poland

    B. Zielińska & A. Bilewicz

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  1. B. Zielińska
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  2. A. Bilewicz
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Zielińska, B., Bilewicz, A. The hydrolysis of actinium. Journal of Radioanalytical and Nuclear Chemistry 261, 195–198 (2004). https://doi.org/10.1023/B:JRNC.0000030956.61947.c5

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  • DOI: https://doi.org/10.1023/B:JRNC.0000030956.61947.c5

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