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Influence of relativistic effects on hydrolysis of Ra2+

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Summary

Using 224Ra radiotracer the first hydrolysis constant (pK1h) of Ra2+ cations has been determined. The pK1h value of Ra2+ was compared with the pK1h values of other Group 2 cations. It has been shown that the electrostatic hydrolysis model based on assumption that pK1h is a linear function of reciprocal ionic radii (1/ri) does not describe well the hydrolysis of Group 2 metal cations. The reason of higher Ra2+ hydrolysis as expected is the influence of relativistic effects on bonding 7s and 7p1/2 orbitals.

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Authors and Affiliations

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

    B. Zielińska

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

    A. Bilewicz

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  1. B. Zielińska
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  2. A. Bilewicz
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Zielińska, B., Bilewicz, A. Influence of relativistic effects on hydrolysis of Ra2+. J Radioanal Nucl Chem 266, 339–341 (2005). https://doi.org/10.1007/s10967-005-0913-4

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  • DOI: https://doi.org/10.1007/s10967-005-0913-4

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