It was pointed out that the early stages of void- and bubble-lattice formation in metals permitted one to distinguish between the linear and planar alignment of voids. The examples of voids in Mo, and bubbles in Al, clearly demonstrated planar rather than linear ordering. Criticism of an assumption made during a Monte Carlo simulation of the influence of 1-dimensional self-interstitial atom transport in void lattice formation was rebutted.

Comments on the Role of 1-D and 2-D Self-Interstitial Atom Transport Mechanisms in Void- and Bubble-Lattice Formation in Cubic Metals. J.H.Evans: Philosophical Magazine Letters, 2007, 87[8], 575-80