二维层状水合酸式硫酸铈H3O[Ce(SO4)2·(H2O)3]·H2O的水热合成与结构表征

镧系金属硫酸盐由于在稀土分离等方面具有重要的应用而受到广泛关注。但是，因其适于结构测定的单晶相对难以得到，迄今，关于稀土硫酸盐的结构报道仍然较少，且主要局限于水合硫酸盐和三元硫酸盐．近几年中，基于硫酸根与磷酸根在结构上的相似性，借鉴在水热／溶剂热体系中采用有机胺作模板剂大量合成具有空旷骨架结构的微孔磷酸盐的成功经验，以有机胺为模板剂合成具有空旷骨架结构的镧系金属硫酸盐的工作也已见诸报道．在这些化合物中，由于硫酸根配位方式的多样性和稀土元素配位数和配位构型的可调变性，展现出了一些有趣的结构特征．

Hydrothermal Synthesis and Structure Characterization of an Acidic Cerium Sulfate Hydrate, H3O[Ce(SO4)2(H2O)3] H2O

An acidic cerium sulfate hydrate,H3O[Ce(SO4)2(H2O)3] H2O,was hydrothermally synthesized and characterized by single crystal X-ray diffraction.The compound crystallizes in monoclinic system,space group P21/c with cell parameters: a=0.677 8(3) nm,b=1.908 2(7) nm,c=0.882 7(3) nm,β=97.332(7)°,V=1.115 5(7) nm3,Z=4,R1=0.029 5,wR2=0.065 0,GOF=0.974.It possesses a layered anion framework constructed of CeO9 tetradecahedra and SO4 tetrahedra with H3O+ ion and H2O molecules located in the aperture of the inorganic layers to balance the negative charge of the framework and stabilized the three-dimensional structure by hydrogen bonding within and between the neighboring layers.The thermal analysis of the compound was also carried out.