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Hyperfine Interactions

, Volume 50, Issue 1–4, pp 659–665 | Cite as

Extraterrestrial magnetite studied by Mössbauer spectroscopy

  • M. B. Madsen
  • S. Mørup
  • J. M. Knudsen
Magnetic Oxide Compounds

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.

Keywords

Iron Spectroscopy Thin Film Fe3O4 Magnetite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1989

Authors and Affiliations

  • M. B. Madsen
    • 1
  • S. Mørup
    • 1
  • J. M. Knudsen
    • 2
  1. 1.Laboratory of Applied PhysicsTechnical University of DenmarkLyngbyDenmark
  2. 2.Physics LaboratoryH.C. Ørsted InstituteCopenhagen ØDenmark

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