“…Up to about 11 at% aluminium, there is a lattice expansion supporting the observation of Ebel et al (9), followed by a contraction (11-21 at% aluminium), and again expansion (21-27 at% a luminium). This is somewhat similar to Pearson's data (8). It may be pointed out that Lihl and Burger do not have data in the range up to 11 at% aluminium.…”