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采用泡生法(Kyropoulos method)生长了稀土掺杂钨酸镱钾[RE:KYb(WO4)2,RE=Nd3+,Er3+]激光晶体,并对其结构特性进行了研究。RE:KYb(WO4)2晶体是由WO6,REO8和KO123种基团组成,W2O10二聚体通过WOW单氧桥相连,在平行于c轴方向上形成(W2O8)n多重带。REO8和KO12多面体共顶相连,沿[101]和[110]方向形成了具有二维层结构的延长带。X射线粉末衍射分析表明:Nd3+:KYb(WO4)2和Er3+:KYb(WO4)2两种晶体具有低温β相RE:KYb(WO4)2结构,属于单斜晶系,空间群为C2/c,计算了晶格常数。晶体红外光谱测试结果表明:在630～930cm-1范围存在5个较强的红外吸收峰,这些吸收峰是由WO4基团的伸缩振动引起的。最后,对峰值与相应的振动模式进行了归属,证实了晶体中WOOW双氧桥和WOW单氧桥键的存在。
The rare earth doped ytterbium tungstate potassium [RE: KYb (WO4) 2, RE = Nd3 +, Er3 +] laser crystals were grown by the Kyropoulos method and their structural properties were studied. The RE: KYb (WO4) 2 crystal is composed of WO6, REO8 and KO123 groups. W2O10 dimers are connected by a WOW monooxy bridge and form a (W2O8) n multiple band parallel to the c-axis. The REO8 and KO12 polyhedrons are co-topped and form an extended ribbon with a two-dimensional layer structure along [101] and [110] directions. X-ray powder diffraction analysis showed that the two crystals of Nd3 +: KYb (WO4) 2 and Er3 +: KYb (WO4) 2 have a low-temperature β-phase RE: KYb (WO4) 2 structure and belong to monoclinic system with space group C2 / c , Calculated the lattice constant. The results of crystal infrared spectroscopy showed that there are five strong infrared absorption peaks in the range of 630 ~ 930cm-1, which are caused by the stretching vibration of WO4 group. Finally, the peak and the corresponding vibrational modes were assigned, confirming the existence of WOOW dioxy bridge and WOW monooxy bridge in the crystal.