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In the present paper, the polarized fluorescence spectra and the infrared absorptionspectra of single crystals of terbium pentaphosphate, TbP_5O_(14), were measured at 77 K. Most ofthe observed transitions were identified and the energy level structure of the ~7F multipletwas also defined. The result of structure analysis indicates that the coordination of the cationto oxygen atoms is eightfold with the geometry of a slightly distorted square antiprism. In otherwords, the local symmetry of the Tb~(3+) in TbP_5O_(14) belongs to C_(4v). The crystal field calculationswere performed for such symmetry and gave a respectable fit for the observed Stark splittingof the ~7F_J (J = 0--6) multiplet. The comparison between the experimental and the calculatedenergy levels shows that the rms deviation and the maximum deviation are 8cm~(-1) and 17cm~(-2),respectively. 相似文献
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本文测定了五磷酸铽单晶在77K下的偏振荧光光谱和红外吸收光谱。根据这些光谱,~5D_4,~7F多重态的能级结构以及跃迁归属已被确认。从X光结构分析的结果,该晶体中Tb~(3+)离子与八个近邻的氧原子相配位,呈稍歪扭的正方反棱柱体。换句话说,在TbP_5O_(14)中Tb_(3+)离子的局部对称性属于C_(4v)。按该对称性,利用配位场理论所做的计算与实验观察的~7F_J(J=0—6)多重态的Stark分裂得到了相当好的符合。其结果是,均方根差为8.4cm~(-1),最大偏差为17cm~(-1)。 相似文献
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TbP5O14的光谱与能级的精细结构 总被引:1,自引:0,他引:1
本文报告了稀土过磷酸盐TbP5O14的精细荧光光谱和红外吸收光谱,并据此解析出了5D4和7FJ的Stark能级结构。 相似文献
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