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Mössbauer spectroscopy of minerals

II. Problem of resolving cis and trans octahedral Fe2+ sites

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Abstract

We demonstrate by trade-off and error analysis of representative spectra that paramagnetic state Mössbauer Spectroscopy of 2∶1 layer silicates cannot resolve the octahedral Fe2+ cis (M2) and trans (M1) sites. We show that it is impossible to extract cis/trans population ratios from two Fe2+ doublet analyses of the spectra and that, instead, one has a single continuous Fe2+ quadrupole splitting distribution (QSD) that cannot reliably or uniquely be partitioned into its constituents. Whereas extracted cis/trans ratios do not contribute to evaluating site occupancies, the QSDs themselves in principle contain much local structural and chemical information that should be the focus of futur work.

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References

  1. Bailey SW (1984a) Review of cation ordering in micas. In S.W. Bailey, Ed., Micas, p. 81–92. Mineral Soc Am (Reviews in mineralogy, vol. 13)

  2. Bailey SW (1984b) Review of cation ordering in micas. Clays Clay Mineral 32:81–92

  3. Christie IAD, Rancourt DG, Kodama H, Murad E, Robert J-L (1993) Oxidation of synthetic annite mica characterized by 57Fe Mössbauer spectroscopy: hydrogen de-intercalation and host layer valence state populations. In: Fisher JE, Bernier P, Roth S, Solin SA, Eds., Chem phys intercalation II, p. 387–391. Plenum, New York

  4. Dyar MD (1987) A review of Mössbauer data on trioctahedral micas: Evidence for tetrahedral Fe3+ and cation ordering. Am Mineral 72:102–112

  5. Ferrow E (1987) Mössbauer and X-ray studies on the oxidation of annite and ferriannite. Phys Chem Minerals 14:270–275

  6. Häggström L, Wäppling R, Annersten H (1969) Mössbauer study of iron-rich biotites. Chem Phys Lett 4:107–108

  7. Hargraves P, Rancourt DG, Lalonde AE (1990) Single-crystal Mössbauer study of phlogopite mica. Can J Phys 68:128–144

  8. Manceau A, Bonnin D, Stone WEE, Sanz J (1990) Distribution of Fe in the octahedral sheet of trioctahedral micas by polarized EXAFS. Comparison with NMR results. Phys Chem Minerals 17:363–370

  9. Ping JY, Rancourt DG (1994) Effective method of direct QSD extraction using combined partial deconvolution. In press, Hyperfine Interactions. Proceedings of the Int. Conf. Applications of the Mössbauer Effect, 1993

  10. Ping JY, Rancourt DG, Stadnik ZM (1991) Voigt-based methods for arbitrary-shape quadrupole splitting distributions (QSD's) applied to quasi-crystals. Hyperfine Interactions 69:493–496

  11. Press WH, Flannery BP, Tenkolsky SA, Vetterling WT (1986) Numerical Recipes, 818 p. Cambridge University Press

  12. Rancourt DG (1994) Mössbauer spectroscopy of minerals I. Inadequacy of Lorentzian-line doublets in fitting spectra arising from quadrupole splitting distributions. (Submitted to Phys Chem Minerals and appearing as preceding paper) 21:244–249

  13. Rancourt DG, Ping JY (1991) Voigt-based methods for arbitrary-shape static hyperfine parameter distributions in Mössbauer spectroscopy. Nucl Instrum Methods Phys Res B58:85–97

  14. Rancourt DG, Dang M-Z, Lalonde AE (1992) Mössbauer spectroscopy of tetrahedral Fe3+ in trioctahedral micas. Am Mineral 77:34–43

  15. Rancourt DG, Tume P, Lalonde AE (1993) Kinetics of the (Fe2++ OH-)mica→(Fe3++O2-)mica+H oxidation reaction in bulk single-crystal biotite studied by Mössbauer spectroscopy. Phys Chem Minerals 20:276–284

  16. Rancourt DG, Ping JY, Berman RG (1994a) Mössbauer spectroscopy of minerals III. Octahedral-site Fe2+ quadrupole splitting distributions in the phlogopite-annite series. (Submitted to Phys Chem Minerals and appearing as following paper) 21:258–267

  17. Rancourt DG, Christie IAD, Royer M, Kodama H, Robert J-L, Lalonde AE, Murad E (1994b) Determination of accurate [4]Fe3+, [6]Fe3+, and [6]Fe2+ site populations in synthetic annite by Mössbauer spectroscopy. Am Mineral 79:51–62

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Rancourt, D.G. Mössbauer spectroscopy of minerals. Phys Chem Minerals 21, 250–257 (1994). https://doi.org/10.1007/BF00202139

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Key words

  • Mössbauer
  • spectral analysis
  • cis-site
  • transsite
  • layer silicate
  • mica