Abstract

The lattice parameters of an anthracene crystal were measured as functions of hydrostatic pressure in the pressure range from 0–5.4 kbar using neutron diffraction techniques. The results were found to agree with previous measurements of the volume compressibility of anthracene and, in the a and b directions, with the values extrapolated from linear compressibility data for linear polyphenyls. The values of the linear compressibilities were used to derive an improved set of elastic constants from currently available velocity of sound data.

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