Soot in carbon-arc smoke has been studied by electron microscopy and X-ray diffraction. The soot was directly collected from the smoke on an electron-microscope grid covered with a carbon film. Many C60 crystals were found in the soot. Amorphous carbon and graphite particles were also observed. The fullerene content in the soot was more than 60%. The C60 molecules were found as crystals in the soot, which were face-centered cubic. It is shown from the calculation of the diffraction intensity from a C60 crystal that the absence of the (002) diffraction is attributable to rapid rotation of C60 molecules. © 1993.
Kaito, C., Kimura, S., Sakamoto, T., Yoshimura, Y., Kaigawa, R., Sakaguchi, T., … Saito, Y. (1993). Fullerene crystal prepared by evaporating amorphous carbon rod in inert gas. Journal of Crystal Growth, 134(3–4), 157–161. https://doi.org/10.1016/0022-0248(93)90121-C