Abstract:
Two-dimensional polymerisation of a C60 single crystal has been obtained under high-pressure high temperature conditions (700 K - 2 GPa). Crystalline order is preserved but the crystal splits into variants (orientational domains). The analysis of X-ray diffraction and Raman spectroscopy data reveals that the polymer crystal is primarily tetragonal with some admixture of rhombohedral phase. Furthermore, Raman spectroscopy gives evidence for additional C60-C60 dimers, which are probably disordered. For the tetragonal phase, it is shown that successive polymer layers are rotated by about the stacking axis, according to the P42/mmc space group symmetry. The structure of the rhombohedral phase is also clarified. The role of the interlayer interactions in stabilising the two-dimensional polymer phases of C60 is discussed.
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Received 8 October 1999
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Moret, R., Launois, P., Wågberg, T. et al. High-pressure synthesis, structural and Raman studies of a two-dimensional polymer crystal of . Eur. Phys. J. B 15, 253–263 (2000). https://doi.org/10.1007/PL00011040
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DOI: https://doi.org/10.1007/PL00011040