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Solid C60: Pressure Induced Phase Transitions |
WANG Jifang;WANG Lijun;CHEN Liangchen;CHEN Hong;WANG Ruju;ZHANG Zhiting;CHE Rongzheng;ZHOU Lei
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Institute of Physics, Academia Sinica, Beijing 100080
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Cite this article: |
WANG Jifang, WANG Lijun, CHEN Liangchen et al 1993 Chin. Phys. Lett. 10 159-162 |
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Abstract Based on in situ high pressure x-ray diffraction with diamond anvil cell by using synchrotron radiation and pressure-quench x-ray measurement, phase transition of C60 under high pressured is studied. The maximum pressure used is 30GPa in quasi-hydrostatic case but 44GPa in nonhydrostatic case. At ambient pressure, C60 crystal is a fcc phase with lattice parameter a=14.2086Å. It transforms from fcc to a lower symmetry phase at pressure of 13.7GPa, and then transforms to an amorphous state under pressure up to 25-30 GPa. This amorphous state is metastable at normal condition. Finally, the experimental results are discussed.
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Keywords:
62.50.+p
64.70.-p
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Published: 01 March 1993
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