SEGREGATION AND DIFFUSION OF SULPHUR IN SOME POLYCRYSTALS AND BICRYSTALS : INFLUENCE OF CRYSTALLOGRAPHIC FACTORS M. Pierantoni, B. Aufray et F. Cabane J. Phys. Colloques, 46 C4 (1985) C4-517-C4-522 DOI: 10.1051/jphyscol:1985457