Figure8

Figure 8. Bond thermal expansion $$ \Delta {C_1}^* $$ for the first shell of scandium fluoride obtained by including (blue squares) or excluding (red circles) the third cumulant $$ {C_3}^* $$. In the present case, by neglecting the third cumulant, $$ \Delta {C_1}^* $$ is widely underestimated. The inset shows the temperature behavior of $$ \Delta {C_3}^* $$.