Theoretical and experimental study of the non-stoichiometric LinI (n = 3 and 5) clusters

► The experimentally obtained ionization energies of the neutral of Li3I and Li5I clusters. ► Geometry and thermodynamic stability of Li3I and Li5I clusters. ► Knudsen cell was placed into ionization chamber of the mass spectrometer. ► Provide a convenient way for generate “superalkali” clusters of the type LinI (n = 2-6).