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 K2Ln(NO3)5·2H2O(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 Fdd2.The coordination number of Pr3+ is 12 and a somewhat distorted icosahedron is formed around Pr3+.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 bluegreen light by frenquency doubling high power near infrared lasers.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
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
关键词
非线性光学晶体
晶体生长
晶体结构
硝酸镨钾
k2Ln(NO3)5·2H2O(Ln=Pr,Nd),nonlinear optic crystal,crystal growth from solution,crystal structure
