In this article through joint cationic and anionic doping brawnmillerite Ba 2In 2O 5 compounds obtained from the homogeneity range Ba 0 8. 0.5 XLa 1. 2In 2O 5. 6. XF x (0 < x < 0.2). It is established that structures are characterized by cubic symmetry (space group Pm3m) by the method of the full-profile analysis of Rietveld. It is proved these phases are capable to high-temperature protonic conductivity. It was found that mixed anion effect comprising the growth of electrical conductivity at low concentrations of fluoride observed for the Ba 08. 0.5 XLa 1. 2In 2O 5. 6. XF x.