Abstract
The intermediate state of (TMTSF)2ClO4 is characterized by resistance and magnetoresistance measurements to consist of an inhomogeneous mixture of superconducting and spin-density-wave regions, whereas the quenched state is purely insulating with a phase-transition temperature TSDW=6.05 K and a zero-temperature gap 2Δ(0)=22 K=3.52TSDW, close to the mean-field value.