Structure of compound Pr5Mo3O16+δ exhibiting mixed electronic—ionic conductivity
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- Antipin, A.M., Alekseeva, O.A., Sorokina, N.I. et al. Crystallogr. Rep. (2015) 60: 640. doi:10.1134/S1063774515050028
The structure of Pr5Mo3O16 + δ single crystals is studied by X-ray diffraction, EDXS microanalysis, transmission microscopy, and XANES spectroscopy. It is found that in the structure Pr and Mo cations mutually replace each other, atomic positions of oxygen are split into several additional positions, and structural voids accommodate interstitial oxygen atoms (which make the main contribution to the conductivity). The disorder of the oxygen sublattice is responsible for the continuity of the framework of the ways of migration of oxygen ions.