A study of polymers of V^th group elements with special references to poly–(Phosphoric acid & Phosphates

This paper describes the study of polyphosphoric acid (PPA) and polyphosphates, which were prepared on the basis of P₄O₁₀ (phosphorus (V) oxide). The ³¹PNMR spectra have shown that the P-atoms are covalently bonded to oxides in form of polyphosphoric acids and in condensed phosphates. The phosphoric acid (PA) and its crystalline hydrates have tetrahedral PO₄ groups, consisting three dimensional strongly hydrogen bonded array. The complex mixture of phosphates anions can be obtained are separated by the using of ion-exchange or chromatographic procedure, respectively.