Nucleation of metallic phases in stone-iron meteorites

Details Nucleation of metallic phases in stone-iron meteorites Nucleation of metallic phases in stone-iron meteorites

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974zmetl..65..702a&link_type=abstract

Zeitschrift für Metallkunde, vol. 65, Nov. 1974, p. 702-708. In German.

Computer Science

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Iron Meteorites, Metal Crystals, Meteoritic Microstructures, Nucleation, Phase Diagrams, Stony Meteorites, Crystal Defects, Iron, Meteoritic Composition, Nickel, Phosphorus, Solid Solutions, Widmanstatten Structure

Scientific paper

In stone-iron meteorites the formation of metallic phases was investigated with the microprobe and by microscopy. Considered are the formation of alpha- and gamma-solid solutions as well as the phosphid, and the distribution of the elements Fe, Ni, and P in these phases. The microstructure of the meteorites can be explained by heterogeneous nucleation reactions of these phases. The alpha-solid solution forms at the interfaces of the non-metallic phases with the gamma-solid solution and at non-metallic inclusions. The phosphid forms first at the alpha + gamma-interfaces. At lower temperatures this phase forms in addition at lattice defects, which may have been introduced by a plastic wave in the meteorite at 500 C.

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