| Issue |
J. Phys. Colloques
Volume 47, Number C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|
|---|---|---|
| Page(s) | C8-787 - C8-790 | |
| DOI | https://doi.org/10.1051/jphyscol:19868150 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-787-C8-790
DOI: 10.1051/jphyscol:19868150
1 SERC, Daresbury Laboratory, GB-Warrington WA4 4AD, Great-Britain
2 Department of Physics, University of Leicester, GB-Leicester LE1 7RH, Great-Britain
J. Phys. Colloques 47 (1986) C8-787-C8-790
DOI: 10.1051/jphyscol:19868150
AN EXAFS STUDY OF IRON-LEAD PYROPHOSPHATE GLASS
G.N. GREAVES1, S.J. GURMAN2 et R.N. JENKINS11 SERC, Daresbury Laboratory, GB-Warrington WA4 4AD, Great-Britain
2 Department of Physics, University of Leicester, GB-Leicester LE1 7RH, Great-Britain
Abstract
Lead phosphate glasses are characteristically prone to aqueous attack but become chemically resistant on the addition of iron. We have measured the K-edge EXAFS of Fe and the L-edge EXAFS of Pb in these glasses and find the atomic environments of the two modifiers to be very different. Our results suggest that Fe sites pin the polyphosphate network and so block the percolation of Pb ions thereby increasing the chemical resistance of the whole structure.