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Unlike conventional glass formers, ionic glasses, whose behaviour is determined by majority cation-anion interactions, contain few network bonds.[1] Three ionic glass series: potassium-zinc sulphate, potassium-zinc phosphate, and zinc sulfophosphate are synthesised, and characterized using Raman, FTIR, and 31P solid-state MAS NMR for structural information. The dependence of ionic conductivity and mechanical properties on glass structure is investigated. To perform 17O solid-state MAS NMR, the glass raw materials are enriched using the conventional 17O -enrichment process via chemical reactions with H217O [2]. Through the analysis of 17O solid-state MAS NMR spectra, bridging and non-bridging oxygens from different chemical environment can be distinguished, respectively [3-5]. The aim is to predict quantitatively preferential bonding between different cations and anions [6]; The whole structure of these glass series could be analysed thoroughly, which could provide great potential and convenience in understanding the structure of glasses without conventional network bonding.

References
[1] C. Calahoo and L. Wondraczek, "Ionic glasses: Structure, properties and classification," Journal of Non-Crystalline Solids: X, vol. 8, p. 100054, 2020.
[2] A. Flambard, L. Montagne, and L. Delevoye, "A new 17 O-isotopic enrichment method for the NMR characterisation of phosphate compounds," Chemical communications, no. 32, pp. 3426-3428, 2006.
[3] H. K. C. Timken, N. Janes, G. L. Turner, S. L. Lambert, L. Welsh, and E. Oldfield, "Solid-state oxygen-17 nuclear magnetic resonance spectroscopic studies of zeolites and related systems. 2," Journal of the American Chemical Society, vol. 108, no. 23, pp. 7236-7241, 1986.
[4] Z. Xu and J. Stebbins, "Oxygen site exchange kinetics observed with solid state NMR in a natural zeolite," Geochimica et Cosmochimica Acta, vol. 62, no. 10, pp. 1803-1809, 1998.
[5] M. Zeyer-Düsterer, L. Montagne, G. Palavit, and C. Jäger, "Combined 17O NMR and 11B–31P double resonance NMR studies of sodium borophosphate glasses," Solid state nuclear magnetic resonance, vol. 27, no. 1-2, pp. 50-64, 2005.
[6] N. Da, O. Grassmé, K. H. Nielsen, G. Peters, and L. Wondraczek, "Formation and structure of ionic (Na, Zn) sulfophosphate glasses," Journal of non-crystalline solids, vol. 357, no. 10, pp. 2202-2206, 2011.