We have obtained the solubility curve of KLu(WO4)(2) in K2W2O7 solvent. From this curve, we have chosen a solution composition, 0.12 KLu(WO4)(2)-0.88 K2W2O7, for subsequent studies of physical properties, prior to choosing the growth conditions for single-crystal growth from a high-temperature solution. Near the saturation temperature, the density of the solution is 3.98 X 10(3) kg/m(3), the surface tension is 0.108 N/m and the dynamic viscosity is 37.5 x 10(-3) Pas, values that are, a priori, suitable for single-crystal growth by Top Seeded Solution Growth-Slow Cooling (TSSG-SC) technique. Taking these results into account, the rotation rate for TSSG-SC was fixed at 40 rpm, while the axial and radial thermal gradients in the solution were 1.5 K/cm. Single crystals of KLU(WO4)(2), transparent and free from macroscopic defects, have been obtained for cooling rates up to 0.2K/h. (C) 2007 Elsevier B.V. All rights reserved.