Extraterrestrial magnetite studied by Mössbauer spectroscopy

M. B. Madsen; S. Mørup; J. M. Knudsen

doi:10.1007/BF02407705

Hyperfine Interactions

June 1989, Volume 50, Issue 1–4, pp 659–665

Extraterrestrial magnetite studied by Mössbauer spectroscopy

Authors
Authors and affiliations

M. B. Madsen
S. Mørup
J. M. Knudsen

Magnetic Oxide Compounds

DOI: 10.1007/BF02407705

Cite this article as:: Madsen, M.B., Mørup, S. & Knudsen, J.M. Hyperfine Interact (1989) 50: 659. doi:10.1007/BF02407705

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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 Fe_2.994O₄.

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Authors and Affiliations

M. B. Madsen
- 1
S. Mørup
- 1
J. M. Knudsen
- 2

1.Laboratory of Applied PhysicsTechnical University of DenmarkLyngbyDenmark
2.Physics LaboratoryH.C. Ørsted InstituteCopenhagen ØDenmark

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Extraterrestrial magnetite studied by Mössbauer spectroscopy

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