Synthesis and characterization of electrical and magnetic properties of ilmenite phases of the type MnTi1-xNbxO3have been carried out. Single phase materials could be obtained for 0.0≤x≤0.25. The electrical conductivity increases with increasing Nb content. Magnetic susceptibility studies show that the phases exhibit 2D antiferromagnetic behavior. The magnetic susceptibility data has been analyzed using Fisher’s specific heat to determine the long range ordering temperature. © 1998 Academic Press.