Structure and occurrences of ≪ green rust ≫ related new minerals of the ≪ fougérite ≫ group, trébeurdenite and mössbauerite, belonging to the ≪ hydrotalcite ≫ supergroup; how Mössbauer spectroscopy helps XRD

J. M.R. Génin, A. Christy, E. Kuzmann, S. Mills, C. Ruby

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Mössbauer spectroscopy yields decisive information for interpreting x-ray diffraction (XRD) patterns in the case of 'green rusts with intercalated CO32- anions, i.e. the chemical analogs of the three minerals that constitute within the ≪ hydrotalcite ≫ supergroup comprising 44 minerals the "fougèrite" group where the structure stays globally unchanged. The only difference comes from the deprotonation of OH- ions at the apices of the octahedrons occupied by the Fe cations so that FeII ions become FeIII. Low angle x-ray diffraction using synchrotron radiation displays the presence of many polytypes which reflects the stacking of brucite like layers and anion interlayers so that a 2D long range order of anions stays unchanged from fougèrite to mössbauerite.

    Original languageEnglish
    Pages (from-to)459-482
    Number of pages24
    JournalHyperfine Interactions
    Volume226
    Issue number1-3
    DOIs
    Publication statusPublished - Apr 2014

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