Si-30-enriched presolar SiC in ACFER 094

Details Si-30-enriched presolar SiC in ACFER 094 Si-30-enriched presolar SiC in ACFER 094

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..393g&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 393.

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9

Meteoritic Composition, Silicon Carbides, Silicon Isotopes, Crystal Structure, Isotopic Enrichment, Grain Size, Ion Concentration

Scientific paper

Ion imaging of Si-28/Si-30 ratios of SiC in the Acfer 094 meteorite identified a group of SiC grains with larger Si-30 enrichments than previously measured in presolar SiC in other meteorites. These grains, present at a level of about 0.2 percent of the 'mainstream' SiC, are less abundant than some previously discovered SiC subgroups. Grains of such low abundance are practically impossible to find using conventioanl techniques. The identification of three such grains is reported here in addition to two which were presented earlier (Gao et al., 1996), as well as one new Z-subgroup type SiC grain.

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