MEu(PO3)4(M=Rb,Cs)的晶体结构研究

Crystal structures of alkali metal rare earth polyphosphates MEu(PO3)4(M=Rb,Cs)

摘要: 采用高温熔盐法合成了2个碱金属稀土磷酸盐MEu(PO3)4(M=Rb,Cs),用单晶X射线衍射技术确定其晶体结构.这2个晶体化合物是异质同构体,属于单斜晶系,空间群为P 21/n(Z=4).在该结构中,PO4螺旋双链与MO11和EuO8多面体相连接构成了一个三维的网络框架结构.

Abstract: Alkali metal-rare earth polyphosphates,MEu(PO3)4(M = Rb,Cs),were synthesized by the high temperature solution reaction and studied by single-crystal X-ray diffraction technique.Isostructural MEu(PO3)4(M = Rb,Cs)belong to the monoclinic space group P 21/n(Z=4)and characterize a three-dimensional framework made up from double PO4 spiral chains and MO11 and EuO8 polyhedra.