Abstract

The electron structures d 0, d 2 and 3 in the 7-th subgroup of the periodic system are found be particularly stable. The stability of these electron configuration doubtlessly depends on the principal quantum number «n» of the d electrons. We expected to answer the question on what is the type of this relationship and does it have periodic properties, using the magnetic spectroscopic and theoretical studies. The results of these studies for the compounds of Re, Tc and Mn are given in the present paper. The theoretical considerations were simplified owing to the fact that in the case of the d 2 and d 3 electron structure the ground terms are defined by the same quantum number L (L = 3, terms 4F and 3F.

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