Quadrupole polarizabilities of Fe<SUP>3+</SUP>- and Ru<SUP>3+</SUP>-like ions

Quadrupole polarizabilities &#945;<SUB>q</SUB> have been calculated for Fe<SUP>3+</SUP>, Co<SUP>4+</SUP>, Ni<SUP>5+</SUP>, and Cu<SUP>6+</SUP> (in 3d<SUP>5</SUP> configuration) and Ru<SUP>3+</SUP>, Rh<SUP>4+</SUP>, Pd<SUP>5+</SUP>, and Ag<SUP>6+</SUP> (in 4d<SUP>5</SUP> configuration) by means of the Hartree-Fock-Slater wave functions and the Sternheimer differential-equation procedure. In the cases of Fe<SUP>3+</SUP> and Ru<SUP>3+</SUP>, &#945;<SUB>q</SUB> values of 0.14 and 0.52 &#197;<SUP>5</SUP>, respectively, are obtained