Fig. 1: Crystal structures of Ba7Nb4MoO20 and Sr3V2O8.
From: Elucidating oxide-ion and proton transport in ionic conductors using machine learning potentials

a Structure of Ba7Nb4MoO20 with partial O1 and O2 site occupancy causing average tetrahedral and octahedral coordination. b Structure of Sr3V2O8. Colours: green for Ba, light blue for Nb, pink for Mo, blue for Sr, grey for V, and red for O.