ATOMISTIC CALCULATIONS ON EDGE DISLOCATIONS IN IONIC CRYSTALS OF ROCK SALT STRUCTURE F. GRANZER, V. BELZNER, M. BÜCHER, P. PETRASCH and C . TEODOSIU J. Phys. Colloques, 34 C9 (1973) C9-359-C9-365 DOI: 10.1051/jphyscol:1973962