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Iron–nickel 50–50 superstructure in the Santa Catharina meteorite

Naturevolume 277pages283284 (1979) | Download Citation



MÖSSBAUER effect and X-ray diffraction measurements have shown that thin lamellae of the Cape York and Toluca meteorites contain the ordered phase Fe–Ni (50–50%) with the structure L10 (refs 1–3). The bulk of these meteorites consists mainly of body centred cubic (b.c.c.) iron–nickel α-phase alloy. We report here Mössbauer spectra, electron microprobes and X-ray measurements which show that in contrast to this, the bulk of the Ni-rich (≈35%) Santa Catharina Ataxite consists of up to 50% Fe–Ni superstructure4.

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  1. Centro Brasileiro de Pesquisas Fisicas, Avenida Wenceslau Braz 71, Rio de Janeiro, Brazil

    • J. DANON
    • , R. SCORZELLI
  2. Museu Nacional, Universidade Federal do Rio de Janeiro, Brazil

  3. Physics Laboratory, I, H.C. Oersted Institute, Universitetsparken 5, DK-2100, Copenhagen Ø, Denmark

    •  & J. M. KNUDSEN


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