2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/19870An analytical result has been obtained for the value of the dynamical charge necessary for calculations of oxygen vacancy kinetics in dielectric perovskite-type crystals. It is shown by using the Berry phase analysis that this charge equals the nominal charge of the vacancy: for example, for the double charged state, it is 2; a neutral vacancy has the zero charge.4 pages, 1 figureMaterials Sciencetext