The analysis of Li i 6708Ã line was performed for 6 rotational phases distributed over the whole rotational period ( \sim 9.5 years ) of HD166473 . The magnetic field model was constructed based on the polarimetric measurements from [ Mathys et al . ( 2007 ) ] . For each observed phase the modulus of the magnetic field was also estimated from simulation of the Fe ii 6147Ã , 6149Ã and Pr iii 6706.7Ã line profiles taking into account Zeeman magnetic splitting . The lithium abundance in each phase was obtained from fitting the observed Li i 6708Ã profile with the synthetic one calculated assuming Paschen-Back splitting and estimated magnetic field characteristics from Pr iii 6706.7Ã line profile .