G. B. M. Vaughan, P. A. Heiney, D. E. Cox, A. R. McGhie, D. R. Jones, R. M. Strongin, M. A. Cichy and A. B. Smith, III, Chem. Phys. 168, 185-193 (1992).
Crystalline C60-O, the first fullerene epoxide, has been studied using calorimetry and high resolution powder x-ray diffraction. At room temperature, C60-O is orientationally disordered with a face-centered cubic lattice, a = 14.185 Angstrom. Upon cooling, an orientational ordering transition at 278 K leads to a low temperature simple cubic phase. At 19 K, this phase is qualitatively similar to the orientationally ordered Pa3-bar phase of C60, with a = 14.062 Angstrom, but with additional randomness due to a distribution of orientations of the oxygen bonds.
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