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Extraterrestrial magnetite studied by Mössbauer spectroscopy

  • Magnetic Oxide Compounds
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Abstract

The meteorite Orgueil is a carbonaceous chondrite of type CI. Carbonaceous chondrites contain Fe(III), Fe(II) and in some cases metallic iron, indicating that they are in a state far from thermodynamic equilibrium. In Orgueil about 40% of the iron is present in magnetite (Fe3O4). In this work a sample of magnetite grains extracted from Orgueil has been studied by Mössbauer spectroscopy. It has been found that the magnetic phase contains about 11% of maghemite and that the remaining magnetite has a vacancy concentration smaller than 0.006, corresponding to the formula Fe2.994O4.

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Authors and Affiliations

  1. Laboratory of Applied Physics, Technical University of Denmark, DK-2800, Lyngby, Denmark

    M. B. Madsen & S. Mørup

  2. Physics Laboratory, H.C. Ørsted Institute, DK-2100, Copenhagen Ø, Denmark

    J. M. Knudsen

Authors
  1. M. B. Madsen
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  2. S. Mørup
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  3. J. M. Knudsen
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Madsen, M.B., Mørup, S. & Knudsen, J.M. Extraterrestrial magnetite studied by Mössbauer spectroscopy. Hyperfine Interact 50, 659–665 (1989). https://doi.org/10.1007/BF02407705

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