Dilatometry and X‐Ray Study of Orientational Phase Transitions in C₆₀

Abstract

In the present paper, the correlation between the lattice parameter in fullerites C₆₀ and the volume discontinuity during the phase transition sc→fcc was studied. The dependence has a complicated nature, and we have developed a simple combinatorical model for a quantative description. It follows from the model that the dimers (C₆₀)₂ also play a significant role in the orientational phase transition. The kinetical study of the phase transition also corroborates this model.

Keywords:

• Fullerene C₆₀
• phase transition
• dilatometry
• polymerization of fullerenes

Acknowledgments

This work was supported by the Russian Foundation for Basic Research (Projects 05‐02‐165969 and 04‐05‐16308), by the Grant of the President of Russia Federation “The Leading Scientific Schools” (project NSh‐307.2003.2) and by the Russian Foundation for the Support of National Science.