@article{oai:nipr.repo.nii.ac.jp:00004652,
 author = {Kagi, Hiroyuki and Takahashi, Kazuya and Masuda, Akimasa},
 journal = {Proceedings of the NIPR Symposium on Antarctic Meteorites},
 month = {Mar},
 note = {P(論文), Raman frequencies for the in-plane lattice vibration of graphite were surveyed for four Antarctic ureilites in order to construct a paradigm for structural properties of graphitic carbon in ureilites. Raman spectra were obtained by point-by-point measurements using a laser microbeam 1μm in diameter. The measured results formed an array in a two-dimensional plot between the E_<2g> frequency and intensity ratio of two graphite-derived Raman bands. The graphitic matter in ALH-78019 gave the averaged E_<2g> frequency at 1582.0 &lrtri;cm^<-1>, which agrees with the well-established wavenumber of the E_<2g> in-plane lattice vibration of graphite. On the contrary, some graphitic matter in the ureilites (ALH-77257,Y-791538 and MET-78008) exhibited considerably up-shifted E_<2g> frequency. Distribution in the array was proved to be closely linked to the extent of shock which the ureilites suffered.},
 pages = {252--261},
 title = {Raman frequencies of graphitic carbon in Antarctic ureilites},
 volume = {7},
 year = {1994}
}