Thermoelectric power and electron structure paameters of CeNi2-xSi2+x crystals

Consideration is given to results of investigation into structure, differential thermoelectric power and effective valence of cerium ions in alloys of Ce–Ni–Si system, based on isoconcentration of 0.2 at.% Ce with 0.35–0.44 at.% Ni and 0.45–0.36 at.% Si. It is shown that CeNi₂₋ₓSi₂₊ₓ represents the compound of variable composition. Effect of Ni→Si substitution is manifested in the form of loosening of crystal lattice and decrease of cerium effective valence. The conducted calculations show, that rearrangement of electron structure of CeNi₂₋ₓSi₂₊ₓ compound in the form of reduction of f-resonance width and its extension to Fermi level, took place at that