Citation: Johnston, K. E.; Tang, C. C.; Parker, J. E.; Knight, K. S.; Lightfoot, P.; Ashbrook, S. E. (2010). The polar phase of NaNbO3: a combined study by powder diffraction, solid-state NMR and first-principles calculations Note: this is a polymorph of lueshite. Journal of the American Chemical Society, 132, pp. 8732-8746.