Spectroscopic approach to chlorine local environment in aluminoborosilicate glasses
Résumé
Chlorine local environment has been investigated using spectroscopic approach (XAS and XPS) for Na-and Ca-bearing aluminoborosilicate glasses synthesised at 1.0 GPa. Based on Cl K-edge EXAFS results, Cl appears to show two local environments in glasses: one at long distance ~2.7 Å assigned to Cl -species charge compensated by Na + and/or Ca 2+ and one at short distance ~1.8 Å assigned to Cl-Cl and Si-Cl species. The Cl 2p XPS results cannot unambiguously confirm the presence of Si-Cl overlapped with Na + /Ca 2+ …Cl -species.
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