Silicon and iron surface abundance distribution that have been reconstructed from the LSD profiles of these elements simultaneously with magnetic field mapping. The star is shown at five rotational phases, as indicated next to each plot. The contours over spherical maps are plotted with a 0.25 dex step. The side bars give element abundances in logarithmic units relative to the Sun, [El] ≡ log (N_el/N_tot)_⋆ − log (N_el/N_tot)_⊙.