005ChemInform Abstract has been investigated using a combination of solid-state 31P, 15N, and 23Na NMR and Raman spectroscopy. The Raman spectra of model phosphazene compounds with different types of P-N bonding have been used for the spectral assignment. The structural results are shown to be consistent with known chemical and physical properties of nitrided NaPO3 glasses. The N atoms replace O in the phosphate glass network both as N bonded to two P atoms via one double and on single bond and as N bonded to three P atoms via single bonds. Nitrogen influences the chemical durability, thermal expansion, and other properties by cross-linking polymeric phosphate chains together in the glass network.

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The structures of phosphorus oxynitride glasses have been determined using a combination of solid-state 3'P, "N, and *'Na nuclear magnetic resonance and Raman spectroscopies. Raman spectra of model phosphazene compounds with different types of P-N bonding have been used to confirm spectral assignments. Results indicate that nitrogen replaces oxygen in the phosphate glass network both as nitrogen bonded to two phosphorus atoms (via one double bond and one single bond) and as nitrogen bonded to three phosphorus atoms via three single bonds. The observed structural features are consistent with data which show that nitrogen influences the chemical durability, thermal expansion, and other properties of phosphate glasses by cross-linking polymeric phosphate chains together in the glass network.

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