Compressibility and Structure of C70
1995 (English)In: Europhysics letters, ISSN 0295-5075, Vol. 30, no 8, 469-474 p.Article in journal (Refereed) Published
The compressibility of C70 has been investigated by means of direct piston and cylinder measurements in the temperature range 150 to 365 K and up to 1 GPa. At 296 and 343 K we find a very rapid change of volume with pressure below 0.15 GPa. We tentatively interpret this as a continuous molecular reorientation with pressure, probably resulting in a transformation from a mixture of face-centred cubic (f.c.c.) and rhombohedral (r.h.) phases to mainly pure r.h. phase. At 365 K as well as at 236 K and below we see no anomalies indicating any structural or rotational anomalies in the pressure range investigated. The zero-pressure bulk modulus decreases with increasing temperature, from 13.1 GPa at 185 K to 7.9 GPa at 365 K. Our volumetric measurements confirm a recently proposed phase diagram for C70.
Place, publisher, year, edition, pages
1995. Vol. 30, no 8, 469-474 p.
Fullerenes, C70, phase diagram, high pressure, compressibility, bulk modulus, molecular orientation, fcc structure, rhombohedral structure
Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-26297DOI: 10.1209/0295-5075/30/8/005OAI: oai:DiVA.org:umu-26297DiVA: diva2:241640