Vivianite auto-oxidation |
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| Authors: | Allen R Pratt |
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| Institution: | Univerity of Waterloo, Department of Earth Sciences, Waterloo, Canada, N2L 3G1 email: apratt@surf.ssw.uwo.ca, CA
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| Abstract: | Vivianite, Fe3(PO4)2×8?H2O, (010) surfaces cleaved in an N2 gas atmosphere are examined using X-ray photoelectron spectroscopy (XPS). Quantitative evaluation of Fe(2p 32) and O(1s) spectra show cleaved surfaces are partly oxidized. Ferric hydroxide is identified as an oxidation product. An auto-reduction-oxidation mechanism involving rupture of hydrogen bonds between the H2O ligands which hold together the sheet structure of vivianite is proposed. |
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