层状硼酸铍H_2BeB_4O_8的合成与结构  

Synthesis and Crystal Structure of Layered Beryllium Polyborate H_2BeB_4O_8

作　　者：李红梅 鞠晶[1] 林建华[1] 

机构地区：[1]稀土材料化学与应用国家重点实验室北京大学化学与分子工程学院,北京100871

出　　处：《无机化学学报》2002年第8期764-768,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金委员会;国家重点基础研究规划项目(No.973项目)

摘　　要：在硼酸介质中合成了一种新的具有层状结构的多硼酸铍H2BeB4O8,并利用多晶X射线衍射方法确定了晶体结构。H2BeB4O8的空间群为P21/n,晶胞参数a=17.7564(2)?,b=4.2948(1)?,c=7.1532(1)?,β=96.8797(9)°。H2BeB4O8的层状结构由双三元环犤BeB4O11犦构成,层之间通过垂直于层平面的羟基所形成的氢键连接成三维结构。A new layered beryllium polyborate H2BeB4O8 was synthesized in molten boric ac id flux. It crystallizes in the monoclinic space group P21/n with lattice consta nts a=17.75640(15)?, b=4.2948(1)?, c=7.1532(1)?, a=96.8797(9)-ray diffraction techniq ues, is composed of double three-membered ring unit [BeB4O11], which is further connected by corner-sharing to form two-dimensional layers. The two-dimensio nal layers are stacked along [100] direction and form three-dimensional structu re via hydrogen bonding. CCDC: 181925.

关 键 词：层状硼酸铍 H2b3b4o8R 合成 多硼酸铍 硼酸介质 层状结构 

分 类 号：O614.21[理学—无机化学]