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Results are presentedof a calculation of the ground state energyfor the various configurations of Sb ions. It is found, that the 5s25p*, 5s15p2, and 5s15p1 atomic configurations correspond to the SbC13,-, SbClZ-, and SbC1; complexes, respectively. These configurations are near t o occupations obtained in the LCAO-MO terms. The nature of a n effective electron attraction on the a~-o r b i t a l in SbC1;-is discussed. In an atomic approach the energy gap value AE is determined. This quantity (AE = 0.043 a.u.) is found to be in good agreement with observations. B p a 6 o~e npmenesi pacseT nonHbIx aHeprmi3 p a a n n s a~x

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