Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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QUANTITATIVE FT-IR ANALYSIS FOR CHONDRITIC METEORITES: SEARCH FOR $C_{60}$ IN METEORITES

  • Kim, Chung-Lee (Center for High Energy Astrophysics and Isotope Studies(CAIS), Ewha Womans University) ;
  • Yang, Jong-Mann (Center for High Energy Astrophysics and Isotope Studies(CAIS), Ewha Womans University)
  • Published : 1998.06.01
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Abstract

Infrared absorption spectra of 9 bulk samples and 3 acid residues of meteorites were obtained in the mid-infrared region ($4000~400cm^{-1}$). From the know composition of meteorites studied, the possible absorption modes were investigated. Most bands of bulk samples occur in the region below $1200cm^{-1}$ and they are due to metallic oxides and silicates. The spectra of each group can be distinguished by its own characteristic bands. Acid residues show very distinct features from their bulk samples, and absorp-tion bands due to organic compounds are not evident in their spectra. Quantiative analyses for two carbonaceous (Allende CV3 and Murchison CM2) and one ordinary (Carraweena L3.9) chondrites were performed for the presence of fullerene ($C_{60}$) in the meteorites. We calculated the concentration of $C_{60}$ in the acid residues by curve-fitting the spectra with Gaussian functions. The upper limit of $C_{60}$ concentration in these meteorites appears to be less than an order of a few hundred ppm.

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