Linear scaling of hyperfine- and superhyperfine interactions

The transfer of an electron from the occupied 2s(F^?) to the empty 4s (Mn²⁺-F^? by lattice-vibrational modulation of attractive nuclear potential is discovered to give rise to the correct reduction of the magnitude of hyperfine interaction of Mn²⁺ ion accompanied by a reduction of superhyperfine coupling of ¹⁹F. This predicted effect is in accord with the experiments in LiF:Mn²⁺ and KMgF₃:Mn²⁺.