The valence band structure of amorphous and crystalline films of rhenium silicides has been studied by ultrasoft x-ray spectroscopy. A theoretical calculation of the electronic structure of bulk crystals and thin films of ReSi 2 and ReSi 1.75 was carried out. The experimental L 2,3 -spectra of silicon show the best correlation with the theoretical calculation for ReSi 1.75 . The decrease in the density of states at the Fermi level in ReSi 1.75 in comparison with ReSi 2 testifies that the phase with lack of silicon is more stable than the stoichiometric composition.

PACS: 71.15.Mb; 71.20.Ps; 78.70.En The electronic states of molybdenum disilicide in the body-centred tetragonal phase have been studied using the self-consistent linearized augmented plane wave method in the local density approximation. The total and local densities of electronic states, X-ray emission spectra of different series were calculated. The obtained results agree well with the known experiments.*lektronnye sosto¾ni¾ ob

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