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The discovery of fullerene C_(60) and subsequent development of carbon arc method for producing macroscopic quantities of this material, have aroused much attention to this third form of carbon. The earliest analysis by X-ray diffraction suggested that crystalline C_(60) had a hexaganal-close-packed (hcp) structure. So far, there have been many reports on the structures of C_(60) powder, single crystals and films, and the results show that the C_(60) molecules are located on the sites of a face-centred-cubic (fcc) lattice at room temperature. There exists a first-order phase transition from fcc phase to sc phase with
The discovery of fullerene C_ (60) and subsequent development of carbon arc method for producing macroscopic quantities of this material, have aroused much attention to this third form of carbon. The earliest analysis by X-ray diffraction suggested that crystalline C_ (60) had So far, there have been many reports on the structures of C_ (60) powder, single crystals and films, and the results show that the C_ (60) molecules are located on the sites of a face-centered-cubic (fcc) lattice at room temperature. There exists a first-order phase transition from fcc phase to sc phase with