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.
Similar content being viewed by others
References
E. Anders and M. Ebihara, Geochim. Cosmochim. Acta 46 (1982) 2363.
B. Nagy, Carbonaceous Meteorites (Elsevier Scientific Publ. Comp., 1975) p. 197.
W. Herr and B. Skerra, in:Meteorite Research, ed. P.M. Millman (Reidel, Dordrecht, Holland, 1969) p. 106.
T.J. Wdowiak and D.G. Agresti, Nature 311 (1984) 140.
M.B. Madsen, S. Mørup, T.V.V. Costa, J.M. Knudsen and M. Olsen, Nature 321 (1986) 501.
K. Tomeoka and P.R. Buseck, Geochim. Cosmochim. Acta 52 (1988) 1627.
J. Jedwab, Earth Planet. Sci. Lett. 2 (1967) 440.
J. Jedwab, Icarus 15 (1971) 319.
J.F. Kerridge, A.L. Mackay and W.V. Boynton, Science 205 (1979) 395.
R. Hutchison,The Search for our Beginning (Oxford University Press, 1983) p. 134.
H.Y. McSween, Jr., Geochim. Cosmochim. Acta 51 (1987) 2469.
L. Häggström, H. Annersten, T. Ericsson, R. Wäppling, W. Karner and S. Bjarman, Hyp. Int. 5 (1978) 201.
R. Aragón, J.P. Shepard, J.W. Koenitzer, D.J. Buttrey, R.J. Rasmussen and J.M. Honig, J. Appl. Phys. 57 (1985) 3221.
A. Ramdani, J. Steinmetz, C. Gleitzer, J.M.D. Coey and J.M. Friedt, J. Phys. Chem. Solids 48 (1987) 217.
H.-P. Weber and S.S. Hafner, Z. für Kristallographie 133 (1971) 327
S. Mørup and E. Both, Nucl. Instr. Meth. 124 (1975) 445.
H. Annersten and S.S. Hafner, Z. für Kristallographie 133 (1971) 327
R. Aragón and J.M. Honig, Phys. Rev. B 37 (1988) 209.
R.J. Pollard, Hyp. Int. 41 (1988) 509.
H. Topsøe, J.A. Dumesic and M. Boudart, J. de Physique 12 (1974) C6–411.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
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
Issue Date:
DOI: https://doi.org/10.1007/BF02407705