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硝酸镧与大环聚醚1,8-萘并-16-冠-5络合物晶体属单斜晶系,空间群P2_1/n,晶胞中含四个分子,晶胞参数a=15.455A,b=11.512A,c=13.825A,β=109.6°。强度数据由PW-1100四圆衍射仪收集,采用CuK_a辐射。结构用重原子法求解,并用全矩阵最小二乘法对全部原子的坐标参数及其各向同性温度因子进行了修,最后的R因子为0.108。镧离子的配位数为11,其中5个醚氧在镧离子的一侧,La-O键长2.59～2.78A,而三个双齿配位硝酸根中的6个氧在另一侧,La-O键长2.59～2.63A。
The crystal of lanthanum nitrate and macrocyclic polyether 1,8-naphthalene-16-crown-5 complex is monoclinic with space group P2_1 / n. The unit cell contains four molecules with unit cell parameter a = 15.455 A , b = 11.512A, c = 13.825A, β = 109.6 °. Intensity data were collected by a PW-1100 four-circle diffractometer using CuK_a radiation. The structure was solved by heavy atom method, and the coordinate parameters of all the atoms and its isotropic temperature factor were revised by full matrix least square method. The final R factor was 0.108. The coordination number of lanthanum ions is 11, of which five oxygen on the side of the lanthanum ion, La-O bond length 2.59 ~ 2.78A, and three bidentate coordination nitrate six oxygen on the other side, La-O bond length of 2.59 ~ 2.63A.