Single crystals of Ba2HoRu1-xCuxO6 have been grown from high temperature solutions using PbO-PbF2, as solvent in the temperature range 1150-1250 degrees C. Crystals with a six sided plate like morphology measuring up to 3 mm across and 0.5 mm thick and polyhedral habit measuring up to 2 and 1 mm in thick mass were obtained. Powder X-ray diffraction patterns obtained on the crystals were indexed to give a monoclinic space group P2(1)/n with lattice parameters a = 5.875(2), b = 5.874(3), c = 8.960(1) and beta = 89.995(2)degrees. The crystals with x = 0 show a single anomaly at 6.5 K corresponding to an antiferromagnetic phase with theta = -21.82 K. The crystals containing Cu show additional anomalies at 18 and 48 K. The SEM and EDS analysis reveals a 2116 phase. (c) 2006 Elsevier B.V. All rights reserved.