Figure10

Figure 10. (A) Comparison between true bond expansion $$ \Delta {C_1}^* $$ measured by EXAFS (squares) and apparent bond expansion $$ \Delta R $$ measured by diffraction (solid line). (B) Resulting temperature dependence of $$ \Delta \langle {\Delta u_{\bot }}^2\rangle $$ (squares) and best fit using the correlated Einstein model (dashed line), which gives $$ {\nu }_{\bot } = 4.1 $$ THz and a constant shift $$ |a_{\bot }| = 0.060 $$Å$$ ^{2} $$. Circles and solid line are, respectively, the resulting perpendicular MSRD and the corresponding Einstein model. Error bars have been omitted for clarity.