  We propose a universal scaling rho*chi=const of the electrical resistivity
rho with the inverse magnetic susceptibility chi^(-1) below the temperature of
the quantum-coherence onset for the Ce 4f states in CeRhSb(1-x)Sn(x). In the
regime, where the Kondo gap disappears (x~0.12), the system forms a non-Fermi
liquid (NFL), which transforms into a Fermi liquid at higher temperature. The
NFL behavior is attributed to the presence of a novel quantum critical point
(QCP) at the Kondo insulator - correlated metal boundary. The divergent
behavior of the resistivity, the susceptibility, and the specific heat has been
determined when approaching QCP from the metallic side.
