| 新型水合稀土多硼酸盐Ln[B5O8(OH)2](Ln=Pr，Nd)的合成与结构 | |
| Synthesis and Structure of a Novel Hydrated Rare Earth Polyborate, Ln[B5O8(OH)2] (Ln=Pr, Nd) | |
| 摘要: 采用熔融硼酸法在200 ℃下合成了一种具有层状结构的新型水合稀土多硼酸盐，Ln[B5O8(OH)2](Ln=Pr，Nd)，并利用粉末X射线衍射技术确定了它的结构。Ln[B5O8(OH)2]晶体属于单斜晶系、P21/c空间群，它的基本构建单元(FBB)是由3个BO4和2个BO3组成的双三元环，[B5O12](2Δ+3T)。每一个FBB和邻近的4个FBB通过共用氧原子相连，形成了具有九元环窗口的层状硼酸根基团，稀土离子位于九元环中心附近。CSD：391317。 | |
| 关键词: 稀土 多硼酸盐 结构 | |
| 基金项目: | |
| Abstract: A novel hydrated rare earth polyborate, Ln[B5O8(OH)2] (Ln=Pr, Nd) has been synthesized by using boric acid as a flux at 200 ℃. Its crystal structure is established by powder X-ray diffraction technique. Ln[B5O8(OH)2] crystallizes in monoclinic space group P21/c. The title compounds consist of a double three-membered ring composed of three BO4 and two BO3 groups as the fundamental building block. The FBB shares four common oxygen atoms with the adjacent FBBs, producing a borate layer containing nine-membered borate ring window, of which the rare earth cations are located around the center. The Ln3+ cations are coordinated with ten oxygen atoms from the nine-membered ring window and the adjacent borate layer. The borate layers are stacked along the b axis and are interlinked by the Ln-O bond. CSD: 391317. | |
| Keywords: rare earth polyborate structure | |
| 投稿时间：2004-11-08 修订日期：2005-03-03 | |
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| 李林艳,廖复辉,李国宝,林建华.新型水合稀土多硼酸盐Ln[B5O8(OH)2](Ln=Pr，Nd)的合成与结构[J].无机化学学报,2005,21(7):949-954. | |
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