Crystalline zirconium(IV) hydrogenarsenate hydrogenphosphate monohydrate: synthesis, ion-exchange properties, and thermal behaviour
Abstract
A new crystalline layered inorganic ion-exchanger with formula Zr(HAsO4)(HPO4)·H2O has been prepared by refluxing the amorphous product. Its ion-exchange properties towards sodium ions and its thermal behaviour, together with that of the pure sodium phases obtained, are reported and discussed. The exchanger is very stable to hydrolysis and has a high exchange capacity. Its general behaviour is intermediate between that of Zr(HPO4)2·H2O and Zr(HAsO4)2·H2O.