  Microscopic mechanism of forming the spin liquid of neutral fermions in Kondo
lattices with nearly integer valence of the f-electrons in presented. It is
shown that the competition between the Kondo scattering and the indirect
exchange interaction can result in stabilization of a state with separated spin
and charge excitations with a Fermi-type spectrum for both of them. The origin
of strong antiferromagnetic fluctuations is briefly discussed.
