Moessbauer spectroscopy of chondrules and matrix from a stony meteorite /ALHA 77278/

Details Moessbauer spectroscopy of chondrules and matrix from a stony meteorite /ALHA 77278/ Moessbauer spectroscopy of chondrules and matrix from a stony meteorite /ALHA 77278/

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phys...26..248r&link_type=abstract

Physica Scripta, vol. 26, no. 3, Sept. 1982, p. 248-256. Research supported by the Statens Naturvidenskabelige Forskningsrad.

Physics

4

Chondrule, Mossbauer Effect, Spectroscopic Analysis, Stony Meteorites, Absorbers (Materials), Chondrites, Iron Alloys, Planetary Nebulae, Powder (Particles)

Scientific paper

Moessbauer investigations of the unequilibrated chondrite ALHA 77278 are reported. The chondrules studied are found to contain the silicates olivine and pyroxene, and one of the chondrules furthermore contains kamacite (b.c.c. iron-nickel alloy). The investigations of a powder mixture of chondrules and matrix show that the meteorite, besides the silicates and the kamacite, contains troilite and taenite (f.c.c. iron-nickel alloy). The taenite is found as a ferromagnetic, totally disordered alloy containing more than 40% nickel. The results are discussed within the framework of the theories about the condensation sequence of minerals in the early solar system.

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