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Vivianite auto-oxidation

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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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Authors and Affiliations

  1. Univerity of Waterloo, Department of Earth Sciences, Waterloo, Canada, N2L 3G1 email: apratt@surf.ssw.uwo.ca, , , , , , CA

    Allen R. Pratt

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  1. Allen R. Pratt
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Received: September 23, 1996/Revised, accepted: November 27, 1996

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Pratt, A. Vivianite auto-oxidation. Phys Chem Min 25, 24–27 (1997). https://doi.org/10.1007/s002690050082

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  • DOI: https://doi.org/10.1007/s002690050082

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