用３－硝基－１，２，４－三唑－５－酮（ＮＴＯ）的锂盐水溶液与Ｅｕ２Ｏ３的稀硝酸溶液反应，合成了ＮＴＯ的铕配合物，其单晶结构用Ｘ射线分析法进行了测定，确定了它的结构式为〔Ｅｕ（ＮＴＯ）３（Ｈ２Ｏ）５〕５Ｈ２Ｏ。其晶体属单斜晶系，空间群为Ｐ２１／ｎ，最终偏离因子Ｒ为０．０２３。晶胞参数如下：ａ１．８７２０（２）ｎｍ，ｂ０．６５４８（３），ｃ１．９３２３（３）ｎｍ，β９５．３３（１）°，Ｖ２．３５８３（５）ｎｍ３，Ｚ４，Ｄｃ２．０２６ｇｃｍ－３，μ２７．６７８ｃｍ－１，Ｆ（０００）１４３２。铕离子的配位数为８，其配位多面体为畸变的十二面体 Nitro-1,2-triazol-5-one (NTO) was reacted with dilute nitric acid solution of Eu2O3 to synthesize a europium complex of NTO. The single crystal structure of the complex was characterized by X-ray analysis It was determined that its structure is [Eu (NTO) 3 (H2O) 5] 5H2O. The crystal is monoclinic with a space group of P21 / n and a final deviation factor of 0.023. The cell parameters are as follows: a1.8720 (2) nm, b0.6548 (3), c1.9323 (3) nm, β95.33 (1) °, V2.3583 (5) nm3, Z4, Dc2.026gcm- 3, μ 27.678 cm -1, F (000) 1432. The coordination number of europium ion is 8, its coordination polyhedron is distorted dodecahedron