Figure6

Figure 6. Comparison between bond thermal expansions $$ \Delta {C_1}^* $$ (solid circles) and the contributions due to the asymmetry $$ {C_3}^*/2{C_2}^* $$ (open circles) and to the shift $$ \Delta{r}_{\max} $$ (triangles) of the effective pair potential for the first six coordination shells of germanium. Solid lines are the crystallographic thermal expansions $$ \Delta{R} $$ reported for comparison. It is evident, in good approximation, that $$ \Delta {C_1}^* = {C_3}^*/2{C_2}^*+\Delta r_{\max} $$. In contrast, except casually for the first shell, $$ {C_3}^*/2{C_2}^* $$ does not correspond to $$ \Delta R $$. Figure taken from Ref.^[38]. © APS Publishing. Reproduced with permission. All rights reserved.