¹⁷ O MAS NMR INVESTIGATION OF P₂O₅ CRYSTALS AND GLASSES

Abstract

One dimensional ¹⁷O MAS NMR along with multiple quantum MAS NMR has been used to identify at least three different oxygen sites, including the bridging oxygens (BO) and two different terminal oxygens (TO), in the hexagonal (h) crystalline form of P₂¹⁷O₅. The ¹⁷ O MAS NMR spectrum from v-P₂¹⁷O₅ reveals that a distribution of oxygen environments are present, such that the BO and TO are not resolvable under simple MAS.