SbxBi1-x alloy single crystals with Bi composition up to 18 at% were grown by the Czochralski method. The effective distribution coefficients of Bi were calculated and used for the growth of Sb-Bi single crystals. The influence of the pulling rate and Bi composition on dislocation density, composition distribution and lattice parameter c in the bulk was studied. Sb-Bi gradient single crystals with a varied Bi composition from 2 to 18 at% have been grown by a modified Czochralski method with Bi feed. The concentration profiles and the lattice parameter c in the grown Sb-Bi gradient single crystals were measured. (C) 2009 Elsevier B.V. All rights reserved.