论文标题
高温四方晶体结构UPT $ _2 $ SI $ _2 $
High temperature tetragonal crystal structure of UPt$_2$Si$_2$
论文作者
论文摘要
报告了使用单晶中子衍射在400 K时确定的高温晶体结构$ _2 $ si $ _2 $。发现原始四方CABE $ _2 $ ge $ _2 $与太空集团P4/$ n m m类型的晶体结构保留。发现PT原子在2a（3/4 1/4 0）和2C（1/4 1/4 Z）Wyckoff位点处的Pt原子的各向异性位移因子异常大。
High temperature crystal structure of UPt$_2$Si$_2$ determined using single-crystal neutron diffraction at 400 K is reported. It is found that the crystal structure remains of the primitive tetragonal CaBe$_2$Ge$_2$ type with the space group P4/$n m m. Anisotropic displacement factors of the Pt atoms at the 2a (3/4 1/4 0) and Si atoms at the 2c (1/4 1/4 z) Wyckoff sites are found to be anomalously large.
