Figure 6
Plot of (a) isotropic atomic displacement parameters and (b) z shifts versus temperature. In (a) plotted error bars are equal to three times the s.u.'s. The Biso [Pb] parameter and the shift δzPb which are displayed are those obtained with the splitting of the Pb atom from its high-symmetry position (0, 0, 0) to the (x, x, 0) position. |