GE Wenwei,ZHANG Huaijin,WANG Jiyang,et al.Raw material synthesis and growth of high quality BaWO4single crystal[J].J Synth Cryst(in Chinese),2005,34(1):38–42. [2]LIU Jinghe,LI Jianli,HONG Yuanjia,et al.Laser crystal growth of Nd:KGd(WO4)2[J].J Chin Ceram Soc(in Chinese),2001,29(2):254–257. [3]FAURE N B,COUGHAUD C,BASSET M,et al.Optical properties and laser performance of neodymium doped scheelites CaWO4and NaGd(WO4)2[J].Appl Phys B:Lasers Opt,1996,63(6):593–598. [4]ZHU Zhongli.Study on crystal growth and properties of rare earth doped compound tungstate including sodium[D](in Chinese,disserta-tion).Changchun:Changchun University of Science and Technology,2005. [5]WANG Buguo,SHI Erwei,ZHONG Weizhuo,et al.Relationship between the orientations of tetrahedral[WO4]2–in tungstate crystals and their morphology[J].J Inorg Mater(in Chinese),1998,13(5):648–654. [6]HANUZA J,MACZKA M,VANDERMASS J H.Vibrational proper-ties of double tungstates of the MⅠMⅡ(WO4)2family(MI=Li,Na,K;MIII=Bi,Cr)[J].J Solid State Chem,1995,117:177–188. [7]ZHU Zhongli,LIN Hai,SUN Yu,et al.Spectroscopy of Nd:NaR?(WO4)2single crystal(R=Bi,Y)[J].Rare Met Mater Eng(in Chinese),2006,35(3):399–402.