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Thermophysical Properties of C70 Up to 1 GPa

Published online by Cambridge University Press:  15 February 2011

A. Lundin ,
A. Soldatov  and
B. Sundqvist
A. Lundin
Affiliation:
Department of Experimental Physics, Umeå University, S-90187 Umeå, Sweden
B. Sundqvist
Affiliation:
Department of Experimental Physics, Umeå University, S-90187 Umeå, Sweden
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Abstract

We have measured the thermal conductivity λ and the compressibility of highly pure C70 in the range 90 to 450 K under pressures up to 1.2 GPa. Our results for the thermal conductivity indicate molecular rotation in C70 above 280 K at zero pressure. The phase boundary for the rotationally disordered phase has an approximate slope dT/dp = 75 K GPa−1. The bulk modulus B increases linearly with increasing p above 0.1 GPa, with an extrapolated zero pressure value at 296 K of B(0) = 8.3 GPa. Unexpected anomalies are found in both B and λ near 100 MPa, and we tentatively suggest that orientational ordering is responsible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 359: Symposium G – Science and Technology of Fullerene Materials , 1994 , 555
Copyright
Copyright © Materials Research Society 1995

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References

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