Integral and local elastic properties of C-60 single crystals

Elastic properties of the f.c.c. phase of solid C-60 have been determined e xperimentally on the base of sound velocity measurements in single crystall ine specimens of different crystallographic orientations. Integral elastic properties were measured by the echo-pulse method at 5 MHz and local elasti c parameters were measured by the acoustic microscopy technique. The local values obtained have confirmed with a good accuracy the results from measur ements of integral elastic properties in single crystals of solid C-60. Fro m these experimental data the magnitudes of elastic stiffness constants for the f.c.c. phase of solid C-60 were calculated. The results obtained are i n good agreement with the theoretical estimations of elastic moduli made in terms of existing models of intermolecular interaction in C-60.