- Sundqvist, Bertil, et al.
Structure, disorder, and phase diagram of C60 up to 1 GPa and below 300 K
Ingår i: High Pressure in Material Science and Geoscience : Proceedings of the XXXII Annual Meeting of the European High Pressure Research Group, Brno 1994. - Praha, Czech Republic : Prometheus. - 80-85849-93-3 ; s. 109-112
- We have measured the compressibility and the thermal conductivity of C60 in the range below 300 K and up to 1 GPa (10 kbar). From the data obtained we have deduced the p-T phase diagram of C60. Literature data show that the ratio of pentagon-to-hexagon oriented molecules in the orientationally ordered phase decreases with increasing pressure, and from our data we conclude that C60 forms a new, completely "hexagon oriented" phase above 0.6 GPa at 150 K, or 1.2 GPa at 300 K. The glass transition temperature (90 K at atmospheric pressure) is found to increase by 54 K/GPa.