Nanocomposite compounds with iron hydroxide and molybdenum disulfide alternating layers have been studied using Fe-57 Mossbauer spectroscopy. Evidence is given of the presence of two oxidation states for iron (Fe(II)/Fe(III)approximate to 1.9). In the temperature range 60-160 K thermal evolution of the absorption areas obeys Debye's model, with the lattice temperature Theta(M) equal to 275 and 320 K for Fe(II) and Fe(III) respectively. At higher temperature (T greater than or equal to 180 K), a new iron state is observed, which can be related to fast electron hopping between certain heterovalent iron ions. Tin-doping enhances this process which can already be detected at 140 K.