Cover Feature: Shedding Light on the Enigmatic TcO 2 ⋅ x H 2 O Structure with Density Functional Theory and EXAFS Spectroscopy (Chem. Eur. J. 59/2022)

Research output: Deactivated: Non-textual form types › Audiovisual publication

Contributors

  • Augusto F. Oliveira - , Chair of Theoretical Chemistry, Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Agnieszka Kuc - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Thomas Heine - , Chair of Theoretical Chemistry, Helmholtz-Zentrum Dresden-Rossendorf, Yonsei University (Author)
  • Ulrich Abram - , Free University of Berlin (Author)
  • Andreas C. Scheinost - , Helmholtz-Zentrum Dresden-Rossendorf, European Synchrotron Radiation Facility (Author)

Abstract

Radioactive Tc in deep nuclear waste repositories can be immobilized by reduction of the highly soluble TcO4− anion by agents like magnetite (Fe3O4) and H2, which create an amorphous TcO2⋅x H2O precipitate. EXAFS measurements combined with DFT calculations reveal that the precipitate is an inorganic polymer formed of zigzag TcO2⋅2 H2O chains and give evidence of an increasing polymerization over time.

Details

Original languageEnglish
Edition59
Publication statusPublished - 21 Oct 2022

External IDs

Mendeley 8d4fa89c-ae72-36dc-8f3e-d0d50b294276
unpaywall 10.1002/chem.202203011

Keywords