STABILITY OF C70FX CRYSTALLINE UNDER HIGH-PRESSURE

In order to study the stability range of C70Fx under high pressure at room temperature, in situ X-ray diffraction experiments were performed under pressures up to 6.7 GPa. It was found that C70Fx transforms fro m a crystalline to an amorphous phase at about 5.5 GPa. The pressure-v olume relation of C70Fx was also investigated. The bulk modulus and it s pressure derivative were determined to be 26.6 (1.8) GPa and 3.0 (0. 7), respectively. (C) 1998 Elsevier Science Ltd. All rights reserved.