Journal de Physique I

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DOI: 10.1051/jp1:1993105
J. Phys. I France 3 (1993) 1059-1070

Self-diffusion in naphthalene single crystals

A. Bendani and L. Bonpunt

Laboratoire de Cristallographie et de Physique Cristalline , Université Bordeaux I, 351 Cours de la Libération, 33405 Talence, France

(Received 6 October 1992, accepted in final form 4 December 1992)

Abstract
Molecular mobility in organic molecular crystals was studied by means of tracer diffusion experiments: self-diffusion of naphthalene into naphthalene single crystals was measured. Three self-diffusion tensors are determined from measurements in different crystallographic directions, at three temperatures (338, 343 and 348 K). The principal axes and the anisotropy of self-diffusion are deduced. The experimental activation energies are determined and compared with results from the literature.