Sizable single crystals of a nonlinear optical (NLO) material, Bi(2)ZnOB(2)O(6), were grown by the Kyropoulos method from stoichiometric ratio compound melt. It is a congruent melting compound and crystallizes in the orthorhombic system, space group Pba2. The morphologies and habits of Bi(2)ZnOB(2)O(6) crystals grown using 100, 010, and 001 seeds were studied. The SHG efficiency of Bi(2)ZnOB(2)O(6) is 3-4 times that of KDP (KH(2)PO(4)). Its birefringence is pretty large (0.085-0.106). The experiments prove that Bi(2)ZnOB(2)O(6) crystal is nonhygroscopic and excellently deliquescence resistant.