Optical beam deflection technique was employed to follow the ion transport
and ion exchange processes taking place in the course of redox transformati
ons of indium-hexacyanoferrate surface layers. The data analysis by the hel
p of a convolution method attested that the principal charge compensating i
ons are cations and the contribution of anions to the charge neutralization
inside the film is less than a few percents in the range [0, 0.85 V].