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Nucleation and Growth of Fe(III)/PO4 Clusters

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Abstract

The first stages of the hydrolysis of Fe(III) in presence of PO4 were studied at the local (P k-edge and Fe k-edge EXAFS spectroscopy) and semi-local scale (SAXS). The presence of PO4 hinders the polymerization of iron at the edge sharing dimer step. Phosphate probably governs the local structure leading to the formation of small and dense clusters. The fitting of both k-edge EXAFS spectroscopies requiered the use of a new 3D model of each nucleation step.

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Authors and Affiliations

  1. Laboratoire Geosciences de l’Environnement, 13545, Aix en provence, France

    J. Rose, A. Masion & J. Y. Bottero

  2. Laboratoire pour l’Utilisation du Rayonnement Electromagnetique, 91405, Orsay, France

    A. M. Flank

  3. Groupe Geochimie, LGIT-IRIGM, 38042, Grenoble, France

    A. Manceau

  4. CRMD, 45067, Orleans, France

    D. Tchoubar

  5. Elf-Atochem, Centre de recherche Rhône-Alpes, 69310, Pierre-Benite, France

    F. Garcia

Authors
  1. J. Rose
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  2. A. M. Flank
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  3. A. Manceau
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  4. A. Masion
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  5. J. Y. Bottero
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  6. D. Tchoubar
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  7. F. Garcia
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Rose, J., Flank, A.M., Manceau, A. et al. Nucleation and Growth of Fe(III)/PO4 Clusters. MRS Online Proceedings Library 432, 151–156 (1996). https://doi.org/10.1557/PROC-432-151

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