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用Ｘ射线衍射法确定了Ｎｄ（ＤＢＭ）３Ｈ２Ｏ、Ｅｒ（ＤＢＭ）３Ｈ２Ｏ的晶体结构与分子结构，实验证实：它们是同构的，属三方晶系Ｒ３空间群，Ｚ＝１，其晶胞参数分别为Ｎｄ（ＤＢＭ）３Ｈ２Ｏ，ａ＝２２．６１５１０（），ｃ＝６．４５３００（）；Ｅｒ（ＤＢＭ）３Ｈ２Ｏ：ａ＝２２．６８００９，ｃ＝６．４０１７０，收敛因子分别为Ｒ（Ｎｄ）＝０．０３９０，Ｒ（Ｅｒ）＝０．０３８７。在此基础上对此类稀土螯合物的结构规律进行了详尽的讨论。
The crystal structure and molecular structure of Nd (DBM) 3H2O, Er (DBM) 3H2O were confirmed by X-ray diffraction. The experiment confirmed that they are isomorphic and belongs to the R3 space group of the tripartite system with Z = 1. The unit cell parameters (DBM) 3H2O: a = 22.68009, c = 6.40170, the convergence factors are R ( Nd) = 0.0390, R (Er) = 0.0387. On this basis, the structure of rare earth chelates have been discussed in detail.