The speciation of Tc(IV) in chloride solutions
- 1. Nantes Univ. (France). Lab. de Physique Subatomique et des Technologies Associees
- 2. Lab. pour l'Utilisation du Rayonnement Electromagnetique, Centre Univ. Paris-Sud, Orsay (France)
Description
The speciation of tetravalent technetium has been studied in HCl solutions ranging from 1.0 to 6.0 M. Tc(IV) exists in 6.0 M HCl as the well characterized TcCl62- chloride complex. In 1.0 M HCl, the chloride ligands of TcCl62- are slowly substituted by other ligands such as H2O, OH- or O2-. So TcClmOn(OH)p(H2O)q(4-m-2n-p)+ compounds may form with (m + n + p + q) = 6. Several speciation techniques such as UV-visible and Raman spectrometries, X-ray absorption spectroscopy and electrochemistry have enabled to get an insight into this problem. All the results have indicated two most likely species of Tc(IV) after aging for about ten days in 1.0 M HCl to be aquo-chlorocomplexes of technetium and not oxo-chorocomplexes: TcCl5 . H2O- and TcCl4 . 2H2O. (orig.)
Additional details
Publishing Information
- Journal Title
- Radiochimica Acta
- Journal Volume
- 88
- Journal Issue
- 9-11
- Journal Page Range
- p. 567-571
- ISSN
- 0033-8230
- CODEN
- RAACAP
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 32007224
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CHLORIDES; ELECTROCHEMISTRY; EXPERIMENTAL DATA; FLUORESCENCE SPECTROSCOPY; HYDROXIDES; LIGANDS; QUANTITATIVE CHEMICAL ANALYSIS; RAMAN SPECTRA; TECHNETIUM COMPLEXES; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA; WATER; X-RAY SPECTROSCOPY
- Descriptors DEC
- CHEMICAL ANALYSIS; CHEMISTRY; CHLORINE COMPOUNDS; COMPLEXES; DATA; EMISSION SPECTROSCOPY; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; INFORMATION; NUMERICAL DATA; OXYGEN COMPOUNDS; SPECTRA; SPECTROSCOPY; TRANSITION ELEMENT COMPLEXES