Calibration of α for different rotational histories (represented with the same colour-coding as in Fig. 2) of a 1 M_⊙ star using solar values for the ratio of present to initial abundances of Li (Li/Li₀ = 1/140, see left panel). The black error bar shows the range 100  ≲  d(Li)  ≲  200. The right panel shows the corresponding depletion of beryllium and the calibrated values of α. In both panels, the case without rotational mixing is shown for reference (black continuous line).