Crystal Structures of the Fluorinated Fullerenes C₆₀F₃₆ and C₆₀F₄₈

Abstract

To elucidate the structures of C60F36 and C60F48, X-ray diffraction and electron diffraction experiments have been performed. It was found that the X-ray diffractograms of C60F36 and C60F48 at room temperature are indexed by bcc and bct lattices, respectively. In situ X-ray diffraction experiments at high temperatures have been also undertaken. The bct to fcc phase transition of C60F48 was observed. The mechanism of the transition and the stabilities of the structures of fluorinated fullerenes are discussed.