K_2Ln(NO_3)5·2H_2O(Ln=Pr,Nd)的晶体结构和非线性光学性质  

Crystal Structure and Nonlinear Optical Properties of K2Ln(NO3)5·2H2O(Ln=Pr,Nd)

作　　者：董文庭[1] 张洪杰[1] 苏锵[1] 林永华[1] 王淑梅[2] 

机构地区：[1]中国科学院长春应用化学研究所稀土化学与物理开放实验室 [2]中国科学院长春物理研究所激发态物理开放实验室

出　　处：《人工晶体学报》1998年第3期219-224,共6页Journal of Synthetic Crystals

基　　金：国家攀登计划项目;国家杰出青年基金

摘　　要：本文采用水溶液中生长晶体的方法合成了ＫＬｎＮ（Ｌｎ＝Ｐｒ，Ｎｄ）的单晶，研究了ＫＰｒＮ的单晶结构及ＫＬｎＮ（Ｌｎ＝Ｐｒ，Ｎｄ）的非线性光学性质。ＫＬｎＮ（Ｌｎ＝Ｐｒ，Ｎｄ）均属正交晶系，Ｆｄｄ２空间群。ＫＰｒＮ的晶胞参数为：ａ＝２．１４１１（３）ｎｍ，ｂ＝１．１２２１０（１０）ｎｍ，ｃ＝１．２２０８（２）ｎｍ，Ｚ＝６，Ｒ＝０．０２４０．ＫＬｎＮ（Ｌｎ＝Ｐｒ，Ｎｄ）的二次谐波光强与ＫＬｎＮ（Ｌｎ＝Ｌａ，Ｃｅ）处于同样的数量级．ＫＬｎＮ容易生长出大尺寸晶体，是一类有应用前景的可产生蓝绿光的倍频转换材料。ingle crystals of K2Ln(NO3)5·2H2O(Ln=Pr,Nd)(KLnN)were grown in water solution at about 40℃ with pH≈1～2.The crystal structure of KPrN was determined for the first time,to our knowledge,by direct method with crystal parameters as follows:a=2.1411(3)nm,b=1.12210(10)nm,c=1.2208(2)nm,Z=6,R=0.0240.Its space group is Fdd2.The coordination number of Pr3+ is 12 and a somewhat distorted icosahedron is formed around Pr3+.The powder SHG intensities of KLnN are 5～9 times larger than that of KDP.The average SHG coefficient of KPrN is a little larger than those of KLnN (Ln=La,Ce,Nd).These crystals may have a potential applied prospect materials for generation bluegreen light by frenquency doubling high power near infrared lasers.

关 键 词：非线性光学晶体 晶体生长 晶体结构 硝酸镨钾 

分 类 号：O614.113[理学—无机化学] O734[理学—化学]