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Thermally activated electron delocalization in deerite

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Abstract

The 57Fe Mössbauer spectra of deerites of different chemical composition, taken at several temperatures, show that Fe2+ and Fe3+ occupy all the six-coordinated lattice sites with a preference of Fe3+ probably for the M(1) to M(3) positions, and a preference of Fe2+ probably for the M(4) to M(6) and the M(7) to M(9) sites. The room and high temperature spectra reveal absorption patterns due to thermally activated Fe2+ → Fe3+ electron delocalization. The extent of electron delocalization is dependent on the chemical composition, e.g., the amount of ions (Mg, Mn, Al) substituting for Fe.

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References

  • Amthauer, G., Annersten, H., Hafner, S.S.: The Mössbauer spectrum of 57Fe in silicate garnets. Z. Kristallogr. 143, 14–55 (1976)

    Google Scholar 

  • Amthauer, G., Evans, B.J.: Single crystal and high pressure 57Fe Mössbauer studies of ilvaite at 298 K. Phys. Chem. Minerals 3, 55 (1978)

    Google Scholar 

  • Amthauer, G., Evans, B.J.: The electronic structure of ilvaite and the pressure and temperature dependence of its 57Fe Mössbauer spectrum. J. Phys. Chem. Solids 41, in press (1980)

  • Bancroft, G.M.: Mossbauer spectroscopic studies of the chemical state of iron in silicate minerals. J. Phys. 40 (C2), 464–471 (1979)

    Google Scholar 

  • Bancroft, G.M., Burns, R.G., Stone, A.J.: Applications of the Mössbauer effect to silicate mineralogy. II. Iron silicates of unknown and complex crystal structures. Geochim. Cosmochim. Acta 32, 547–559 (1968)

    Article  Google Scholar 

  • Beran, A., Bittner, H.: Untersuchungen zur Kristallchemie des Ilvaits. Tschermaks Mineral. Petrogr. Mitt. 21, 11–29 (1974)

    Google Scholar 

  • Evans, B.J.: Experimental studies of the electrical conductivity and phase transitions in Fe3O4, Wolfe, H.C. (ed.). AIP Conf. Proc. on Magnetism and Magnetic Materials 24, 73–78 (1975)

    Google Scholar 

  • Fleet, M.E.: The crystal structure of deerite. Am. Mineral. 62, 990–998 (1977)

    Google Scholar 

  • Frank, E., Bunbury, D. St. P.: A study of deerite by the Mössbauer effect. J. Inorg. Nucl. Chem. 36, 1725–1730 (1974)

    Article  Google Scholar 

  • Gérard, A., Grandjean, F.: Observations by the Mössbauer effect of an electron hopping process in ilvaite. Solid State Commun. 9, 1845–1849 (1971)

    Google Scholar 

  • Ghose, S.: Crystal chemistry of iron. In: Handbook of geochemistry, vol. II/1, 26-A, Wedepohl, K.H. (ed.). Berlin, Heidelberg, New York: Springer 1969

    Google Scholar 

  • Langer, K., Lattard, D., Schreyer, W.: Synthesis and stability of deerite, Fe1 ) 2 +Fe6 3+[Si1 2O4 0] (OH)10, and Fe3+ ⇌ Al3+ substitutions at 15–28 kb. Contrib. Mineral. Petrol. 60, 271–297 (1977)

    Article  Google Scholar 

  • Loeffler, B.M., Burns, R.G., Tossell, J.A.: Metal-metal charge transfer transitions: Interpretations of visible-region spectra of the moon and lunar materials. Proc. 6th Lunar Sci. Conf. 3, 2663–2676 (1975)

    Google Scholar 

  • Lotgering, F.K., Diepen, A.M. van: Electron exchange between Fe2+ and Fe3+ ions on octahedral sites in spinels studied by means of paramagnetic Mössbauer spectra and susceptibility measurements. J. Phys. Chem. Solids 38, 565–572 (1977)

    Google Scholar 

  • Nolet, D.A., Burns, R.G.: Temperature dependent Fe2+ → Fe3+ electron delocalization in ilvaite. Geophys. Res. Lett. 5 (10), 821–824 (1978)

    Google Scholar 

  • Nolet, D.A., Burns, R.G.: Ilvaite: a study of temperature dependent electron delocalization by the Mössbauer effect. Phys. Chem. Minerals 4, 221–234 (1979)

    Article  Google Scholar 

  • Pollak, H., Quartier, R., Bruyneel, W., Walter, P.: Electron relaxation in deerite. J. Phys. 40, C2, 455 (1979)

    Google Scholar 

  • Ruby, S.L.: Why MISFIT when you already have x 2? In: Mössbauer effect methodology, vol. 8, Gruverman, J. (.), New York: Plenum Press 1973

    Google Scholar 

  • Smith, G., Strens, R.G.J.: Intervalence-transfer absorption in some silicate, oxide, and phosphate minerals. In: The physics and chemistry of minerals and rocks, Strens, R.G.J. (ed.). New York: J. Wiley and Sons 1976, pp. 583–612

    Google Scholar 

  • Schliestedt, M.: Preliminary note on deerite from high-pressure metamorphic rocks of Sifnos, Greece. Contrib. Mineral. Petrol. 66, 105–107 (1978)

    Article  Google Scholar 

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Authors and Affiliations

  1. Institut für Mineralogie, Universität Marburg, 3550, Marburg, Germany (F.R.G.)

    G. Amthauer

  2. Institut für Mineralogie und Kristallographie, Technische Universität Berlin, 1000, Berlin 12, Germany (F.R.G.)

    K. Langer

  3. Mineralogisch-Petrographisches Institut, Technische Universität Braunschweig, 3300, Braunschweig, Germany (F.R.G.)

    M. Schliestedt

Authors
  1. G. Amthauer
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  2. K. Langer
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  3. M. Schliestedt
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Amthauer, G., Langer, K. & Schliestedt, M. Thermally activated electron delocalization in deerite. Phys Chem Minerals 6, 19–30 (1980). https://doi.org/10.1007/BF00308390

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  • DOI: https://doi.org/10.1007/BF00308390

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