Аннотация:Here we report the results of a study on the Shubnikov-de Haas effect (SdH) in the first synthesize binary graphite intercalation compound (GIC) C12FeCl3(ICl)0.75 of the first stage acceptor-acceptor type and of the second stage GIC C12FeCl3 and C16ICl. The structure and the phase transition order-disorder type also have been investigated.