1 shows nonlinear least-squares fits of trajectory data from Ref. The revised values for the fitting parameters are summarized in Table 1 . They agree quantitatively with those in Ref. Consequently, the conclusions drawn in Ref. We are grateful to Jean-Pierre Hansen for independently bringing this error to our attention.
Solid lines are nonlinear least-squares fits to Eq.
Dashed lines indicate the expected error in given the estimated error in locating sphere centers. Interaction and diffusion coefficients for spheres in colloidal crystals with volume fractions and . Where indicated, lengths are expressed in units of the crystals' lattice constants, a , for comparison with Ref.