Studies on Lattice Vibrational Modes of Na5Eu（WO4）4 Single Crystal by Raman Spectrum
来源期刊：Journal of Rare Earths1991年第4期
论文作者：郭常新 潘峻 郭立群
文章页码：273 - 278
摘 要：<正> Raman and infrared spectra of host luminescent crystal Na5Eu（WO4）4 in several different geometric con-figurations have been investigated.The symmetrical species of lattice vibrational modes of the crystal have beenanalysed by means of the site group analysis method of group theory.The experimental vibrational modes havebeen assigned to Ag,Bg,Eg,Au and Eu of crystal factor group C4h.Because the energies of stretchingvibrational modes of（WO4）2-ion groups are very high(in the range of 755～940 cm-1),multiphononnonradiative transitions of 5D2→5D1 and 5D1→5D0 in Eu3+will occur.So it causes Eu3+ions inNa5Eu（WO4）4 to emit 5D0→5Fj（j=1,2,3,4）emissions mainly at room temperature and the emission light ofNa5Eu（ WO4）4 has high red colour purity.
郭常新，潘峻，郭立群
摘 要：<正> Raman and infrared spectra of host luminescent crystal Na5Eu（WO4）4 in several different geometric con-figurations have been investigated.The symmetrical species of lattice vibrational modes of the crystal have beenanalysed by means of the site group analysis method of group theory.The experimental vibrational modes havebeen assigned to Ag,Bg,Eg,Au and Eu of crystal factor group C4h.Because the energies of stretchingvibrational modes of（WO4）2-ion groups are very high(in the range of 755～940 cm-1),multiphononnonradiative transitions of 5D2→5D1 and 5D1→5D0 in Eu3+will occur.So it causes Eu3+ions inNa5Eu（WO4）4 to emit 5D0→5Fj（j=1,2,3,4）emissions mainly at room temperature and the emission light ofNa5Eu（ WO4）4 has high red colour purity.
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