Proton conduction oxygen deficiency

Proton Conduction in Inherently Oxygen-Deficient Perovskites... 

There are, according to the foregoing discussion, several possibilities of ordered phases of hydrated inherently oxygen-deficient perovskites. The order refers to the vacant oxygen sites where water molecules, hydroxide ions, or oxide ion interstitials reside. However, also protons distributed randomly may order, and this seems indeed to happen when these materials are hydrated fully at relatively low temperatures the protons are ordered and the proton conduction is accordingly small. The ordering of protons may be as water molecules in interstitial sites or as hydroxide ions in particular lattice sites. 

S. Noirault, S. C61erier, O. Joubert, M.T. Caldes, Y. Piffard, Incorporation of water and fast proton conduction in the inherently oxygen-deficient compound La26027(B03)g. Adv. Mater. 19, 867-870 (2007)... 

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