Iron-nickel alloys in a taenite lamella from the iron meteorite Cape York as measured by conversion electron Moessbauer spectroscopy

Physics

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Iron Meteorites, Meteoritic Composition, Mossbauer Effect, Crystal Lattices, Electron Microscopy, Iron Alloys, Lamella (Metallurgy), Microstructure, Nickel Alloys, Phase Transformations

Scientific paper

Taenite lamellae from iron meteorites consist of different iron-nickel phases, e.g., a paramagnetic, disordered fcc phase (less than about 25 percent Ni) and a ferromagnetic, ordered FeNi (50-50 percent) phase. By reflection Moessbauer spectroscopy using a conversion electron counter it is possible to study thin surface layers (1000 A) of the lamellae. Information on the distribution of phases in a taenite lamella from the iron meteorite Cape York has been obtained by combining etching and conversion electron Moessbauer spectroscopy.

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