High-pressure, low-temperature structural studies of orientationally ordered C 60
1993; IOP Publishing; Volume: 5; Issue: 43 Linguagem: Inglês
10.1088/0953-8984/5/43/005
ISSN1361-648X
AutoresWilliam I. F. David, R.M. Ibberson,
Tópico(s)High-pressure geophysics and materials
ResumoThe low temperature orientationally ordered structure of C60 consists of rapid reorientation between two structurally distinct configurations. At ambient pressure, the lower-energy orientation, described by pentagons facing (110) bonding directions. has a larger volume than the second orientation, described by hexagons facing (110). In this paper, it is shown that application of a modest pressure of around 2 kbar is sufficient to make the 'hexagon orientation' the more energetically favourable. indicating that the structural ground state of C60 is highly pressure dependent.
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