Energy-dispersive X-ray diffraction measurements on C-60 were undertaken at
every 1-10 min interval while high temperature (200-800 degreesC) was held
constant for at longest 3 h under pressures of 12.5 and 14.3 GPa. The resu
lts from this and additional experiments have provided an insight into the
time, pressure, and temperature dependency of the fullerene-derived superha
rd materials. (C) 2001 Elsevier Science B.V. All rights reserved.