Figure 4. Time course of the change in occupancy of Tl⁺ that has substituted bound K⁺ in the crystal.

Open squares, filled circles and open triangles, respectively, represent the anomalous occupancy at sites I, II and C, as determined with CNS¹⁵. Curves are single exponential fits to the data with time constants of 41 and 105 s. Inset shows the initial part of the same data.