Phase Transformations of C_<70> Fullerite under High Pressure of 6.5-12.5GPa and Temperature 300-1720 K : Comparison with C_<60>
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High-pressure high-temperature polymerization of C<SUB>70</SUB> fullerite obtained at first time. New crystal structures of rhombohedrally distorted fcc type and bct type are found for the samples quenched after treatment at p = 6. 5-12. 5 GPa and T = 500-900 K. In the temperature range of 900-1720 K a disordered cross-linked layered structures are found. Samples with bct type crystal structure and with disordered structure have hardness in the range of 30-90 GPa and their density varies in the range of 2. 1-2. 8 GPa. These data are compared with the data for materials obtained from C<SUB>60</SUB> fullerite under the same conditions.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 814-816, 1998
The Japan Society of High Pressure Science and Technology