Oxidation state variation under beta-irradiation in an iron-bearing soda lime glass system

Stéphanie Rossano (1) , Liliane Jean-Soro (2) , Bruno Boizot (3) , Francois Farges (4) , Eric D. van Hullebusch (1) , J. Labanowski (5) , L. Gouzin (2) , R. Combes (2) , Jorge Linares (6) , J.C. Swarbrick (7) , M. Harfouche (8)

1 G2I - Géomatériaux et géologie de l'ingénieur
2 LGE - Laboratoire Géomatériaux et Environnement
3 LSI - Laboratoire des Solides Irradiés
4 LMCM - Laboratoire de Minéralogie et Cosmochimie du Muséum
5 LCME - Laboratoire de Chimie et Microbiologie de l'Eau
6 GEMAC - Groupe d'Etude de la Matière Condensée
7 ESRF - European Synchrotron Radiation Facility
8 SLS-PSI - The Swiss Light Source (SLS)

The effect of ionizing radiation on glasses in the system SiO2-CaO-Na2O-Fe2O3 is investigated as a function of iron concentration or / and irradiation dose by a pre-edge analysis at the iron K-edge. While reduction phenomenon is clearly observed for large irradiation doses (5 C), the effect of irradiation for intermediate doses is more challenging to interpret. Comparison between X-ray absorption measurements, colorimetry results and Electron Paramagnetic Resonance measurements suggest that iron environment may be modified without the ions being reduced.

Keywords: XAFS; Iron; Glass; Irradiation

Domains: Materials Science [cond-mat.mtrl-sci]

Stéphanie Rossano, Liliane Jean-Soro, Bruno Boizot, Francois Farges, Eric D. van Hullebusch, et al.. Oxidation state variation under beta-irradiation in an iron-bearing soda lime glass system. 14th International Conference on X-Ray Absorption Fine Structure (XAFS14), Jul 2009, Camerino, Italy. pp.012194, ⟨10.1088/1742-6596/190/1/012194⟩. ⟨hal-00512619⟩