The basic approach in the microscopic theory of binary metal systems has been developed. The electron-ion model Hamiltonian with nonlocal manyparticle interactions was obtained using the statistical operator averaging for the electron-nuclear model over the localized electron states. The role of orthogonalization and exchange effects on the formation of electron-ion interactions is investigated. The transition to the ion metal model with effective manyparticle interactions was performed. Key

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... ds: basic approach, electron-nuclei model, electron-ion model, ion model, manyparticle interactions PACS: 71.55.Ak c S.P.Koval', V.B.Solovyan