“…An alternative mechanism to prismatic punching for producing microplasticity, studied, e,g. by the indentation technique (Brookes, O'Neill and Redfern 1971), is, of course, conventional slip and our exploratory experiments on LiF (Evans, Redfern and Wronski 1972) have shown this to be the mechanism operating during pressurieation. The purpose of this communication is to report results of the detailed examination of dislocations generated by hydrostatic pressure in relatively pure LiF containing elastic discontinuities in the form of voids.…”