钼酸钆晶体的结构及喇曼光谱研究  

Study on Structure and Raman Spectra of Gd_2(MoO_4)_3 Crystal

作　　者：孙会芳[1] 余昺鲲[1] 侯怀宇 尤静林[2] 蒋国昌[2] 袁清习[3] 潘守夔[3] 

机构地区：[1]上海大学理学院,上海200436 [2]上海市钢铁冶金新技术开发应用重点实验室,上海200072 [3]中国科学院上海光学精密机械研究所,上海201800

出　　处：《上海大学学报（自然科学版）》2001年第4期374-376,共3页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金 (5 983 2 0 80 ;5 98740 16)资助项目

摘　　要：全面介绍了钼酸钆晶体的结构及相变情况 ;对其常温喇曼光谱进行了测试和详细分析 ,对各谱峰进行了识别和指认 ,指出实验中仅能观察到两条 Mo O42 -离子的对称伸缩振动谱线是因两种 Mo- O键长相近的 Mo O42 -离子振动模的简并造成的 ,反对称伸缩振动模式大的光谱分裂范围是因晶胞中 Mo O42 -Structure and phase transition of Gd 2(MoO 4) 3 crystal are reported. Raman spectra of the crystal is observed and analysed at room tempertrue. Identification and assignment of its vibrational modes are completed. That only two Raman lines of the symmetric streching mode were observed is due to an accidental degeneracy between 2 sets of MoO 4 2- ions whose Mo-O distances are closed. The large splitting observed for the asymmetric streching mode is probably due to the large number of MoO 4 2- ions and strong interlayer coupling present in the unit cell.

关 键 词：相变 喇曼光谱 伸缩振动模式 弯曲振动模式 钼酸钆晶体 晶体结构 

分 类 号：O614.339[理学—无机化学] O766[理学—化学]