Anion Exchange Behaviour of Zr, Hf, Nb, Ta and Pa as Homologues of Rf and Db in Fluoride Medium

Authors

  • Fabiola Monroy-Guzman Instituto Nacional de Investigaciones Nucleares
  • Didier Trubert Institut de Physique Nucléaire
  • Lucette Brillard Institut de Physique Nucléaire
  • Michel Hussonnois Institut de Physique Nucléaire
  • Olimpus Constantinescu Institut de Physique Nucléaire
  • Claire Le Naour Institut de Physique Nucléaire

DOI:

https://doi.org/10.29356/jmcs.v54i1.961

Keywords:

Rutherfordium, Dubnium, HF, Anion exchange, Zr, Ta, Nb

Abstract

Studies of the chemical property of transactinide elements are very difficult due to their short half-lives and extremely small production yields. However it is still possible to obtain considerable information about their chemical properties, such as the most stable oxidation states in aqueous solution, complexing ability, etc., comparing their behaviour with their lighter homologous in the periodic table. In order to obtain a better knowledge of the behavior of rutherfordium, Rf (element 104), dubnium, Db (element 105) in HF medium, the sorption properties of Zr, Hf, Nb, Ta and Pa, homologues of Rf and Db, were studied in NH4F/HClO4 medium in this work. Stability constants of the fluoride complexes of these elements were experimentally obtained from Kd obtained at different F- and H+ concentrations. The anionic complexes: [Zr(Hf)F5]-, [Zr(Hf)F6]2-, [Zr(Hf)F7]3-, [Ta(Pa)F6]-, [Ta(Pa)F7]2-, [Ta(Pa)F8]3-, [NbOF4]- and [NbOF5]2- are present as predominant species in the HF range over investigation.

 

 

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Published

2019-06-17

Issue

Vol. 54 No. 1 (2010): Special Issue of the J. Mex. Chem. Soc. in Honor of Dr. Silvia Bulbulian

Section

Regular Articles

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