Raman frequencies of graphitic carbon in Antarctic ureilites
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概要
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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 ⊿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.
- 国立極地研究所の論文
著者
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Kagi Hiroyuki
Geochemical Laboratory The University Of Tokyo
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Kagi Hiroyuki
Institute Of Materials Science University Of Tsukuba
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Masuda Akimasa
Department Of Chemistry Faculty Of Science University Of Tokyo
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Masuda Akimasa
Department Of Chemistry Faculty Of Science The University Of Tokyo
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Kagi H
Laboratory For Earthquake Chemistry Faculty Of Science University Of Tokyo
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Takahashi Kazuya
Earth Science Laboratory Institute Of Physical And Chemical Research (riken)
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Takahashi Kazuya
Earth Science Laboratory The Institute Of Physical And Chemical Research (riken)
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