Abstract
We have studied the metallic phases in two equilibrated ordinary chondrites Al Kidirate (H6) and New Haifa (L4) using Mössbauer spectroscopy and synchrotron X-ray diffraction. Mössbauer spectra on taenite-enriched samples from the two meteorites identify the following Fe-Ni phases: the ferromagnetic ordered taenite (tetrataenite) with ∼ 50 % Ni, the ferromagnetic disordered taenite with ∼ 50 % Ni, the low-Ni (∼ 25 %) paramagnetic taenite, and small amounts of the α phase kamacite/martensite. The tetragonal unit cell parameters, in the space group P4/mmmm, of tetrataenite from Alkidirate meteorite are: a = 3.5680 ± 0.0018 Å; c = 3.5901 ± 0.0015 Å; c/a = 1.0062.
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Abdu, Y.A., Ericsson, T., Annersten, H., Dubrovinskaia, N.A., Dubrovinsky, L.S., Gismelseed, A.M. (2002). Mössbauer studies on the metallic phases of Al Kidirate and New Haifa meteorites. In: Thomas, M.F., Williams, J.M., Gibb, T.C. (eds) Hyperfine Interactions (C). Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0281-3_93
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DOI: https://doi.org/10.1007/978-94-010-0281-3_93
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