Modeling the secondary emission yield of salty ice dust grains

► We used improved secondary electron emission model of Richterova et al. (2010) to reveal influence of salt admixture to ice grains. ► Any reasonable admixture of NaCl in ice cannot significantly alter secondary emission. ► The discussion of our results shows that similar conclusions may be made for photoemission. ► Model calculations prove that the size dependence dominates over impurity influence. ► The validity of Jurac et al. (1995) calculations for micron-sized (and larger) grains is confirmed.