在pH=5.5和80℃下,Na2WO4?2H2O,NaAsO2?6H2O,Co(NO3)2?6H2O和咪唑的水溶液反应,得到了高产率的夹层型杂多酸盐(C3H5N2)2Na8[{Co(H2O)}2WO(H2O)(AsW9O33)2]?33H2O单晶,用X射线单晶衍射法及元素分析确定了其结构。结果表明:该晶体属四方晶系,空间群P-421m,a=1.7191(10),c=1.6376(13)nm,V=4.840(5)nm3,Z=2,R1=0.0484,wR2=0.0714(I>2σ),杂多阴离子[{Co(H2O