Growth and structure of monoclinic KLu(WO4)2 crystals

KLu(WO4)2 (KLuW) crystals with sizes up to 42×32×12 mm3 have been grown from the K2W2O7 solvent system by the top-seeded solution growth (TSSG) slow-cooling method. The crystal structure of monoclinic KLuW crystals has been refined in space group C2/c at room temperature by using single-crystal X-ray diffraction data and the KLuW morphology was studied from the Hartman-Perdok theory. Crystal shapes vary greatly with the seed orientations, whereas {1 1 0}, {1¯ 1 1}, {0 2 0} and {3 1 0} faces are more developed than the others.