Polytype distribution in circumstellar silicon carbide.

@article{Daulton2002PolytypeDI,
  title={Polytype distribution in circumstellar silicon carbide.},
  author={Tyrone Louis Daulton and Thomas J. Bernatowicz and Roy Stephen Lewis and Scott Messenger and Frank J. Stadermann and Sachiko Amari},
  journal={Science},
  year={2002},
  volume={296 5574},
  pages={
          1852-5
        }
}
  • Tyrone Louis Daulton, Thomas J. Bernatowicz, +3 authors Sachiko Amari
  • Published in Science 2002
  • Chemistry, Medicine
  • The inferred crystallographic class of circumstellar silicon carbide based on astronomical infrared spectra is controversial. We have directly determined the polytype distribution of circumstellar SiC from transmission electron microscopy of presolar silicon carbide from the Murchison carbonaceous meteorite. Only two polytypes (of a possible several hundred) were observed: cubic 3C and hexagonal 2H silicon carbide and their intergrowths. We conclude that this structural simplicity is a direct… CONTINUE READING

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