Citation: Smirnova, O.; Kumada, N.; Takei, T.; Yonesaki, Y.; Yashima, M.; Kinomura, N. (2010). Structure and electrical properties of the new pyrochlore-type protonic solid electrolyte K~0.88~Nb~2~O~7.58~H~4.28~. Acta Crystallographica Section B, 66, pp. 594-602.
Formula: H17.14 K3.52 Nb8 O30.32
Chemical name:potassium hydrogen niobate hydroxide hydrate