Figure 15
Histograms of the mean-square displacements of the Bi mode sets for each symmetry operation of , summed over all k and 320 ensembles. The amplitudes and breadths of the MSDs show that the face-centering [+(, 0, ), +(0, , )] and inversion (i) symmetry operations are not well followed by the Eu, T2u and T1u(2) representations. |