DISTORTION OF AN FCC-STRUCTURE UPON THERMOBARIC TREATMENT OF C-60

The C-60 samples subjected to thermobaric treatment at a pressure of 1 3 GPa and temperatures 900-1300 K have been studied by the methods of transmission electron microscopy. Two triclinic crystal lattices are i dentified. It is shown that thermobaric treatment results in the forma tion of a set of crystal structures with distorted fcc-lattices. The d istortion of fee-lattices, a decrease of the lattice parameters, and a n increase of the density of the phases obtained are explained by the formation of chains of bound C-60 molecules.