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Figure 7
Change in radius of the minority atom on alloying i.e. RArA is plotted versus RA/RB for MoSi2-type compounds. rA is the radius of the A atom in the structure and is calculated from the lattice parameters as 0.5[(a2/2) + (c2/36)]1/2. The plot is linear and RArA is almost zero when RA/RB = 1. The compounds with [\Delta\varphi] = [{\varphi}_{A}][{\varphi}_{B}] positive (blue squares) have RArA negative, and [|{R}_{A}][{r}_{A}|] increases with the deviation of RA/RB from 1. The compounds with [{\varphi}_{A}][{\varphi}_{B}] negative (red open circles) have rA decreasing with increasing RA/RB.

ISSN: 2053-2733
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