Single crystals of PbMg1/3Ta2/3O3 (PMT) were grown by the flux method. The PbO-Pb3O4-B2O3 system was used as a solvent. Transparent and light yellow PMT single crystals of rectangular shape and dimensions up to 10 x 6 x 4 mm 3 were obtained. For the applied growth conditions only, the crystals of the perovskite structure were grown. X-ray diffraction tests showed that at room temperature PMT exhibits Cubic symmetry with lattice parameter a = 4.042(1) angstrom. Dielectric studies pointed to relaxor properties of PMT. The characteristic broad and frequency-dependent maximum of dielectric permittivity was observed at 179.7 K (1 kHz). (c) 2007 Elsevier B.V. All rights reserved.