The form of ion cluster was observed by transforming the [ - so3h ] to [ - so3ag ] and the theory of the forming of cluster was discussed in this thesis . it was concluded that both the ion cluster and multiplet coexist in the membranes 通过ag +的置换反应,把卜so3hi置换为[一o3agl ,直接观察到了离子簇的存在形式,探讨了离子簇的形成机理,在此基础上得出了膜中既有离子簇又有多重离子对存在的结论。