Orientation domains in the intermediate product Na₃TiOF₅ during the synthesis of anatase TiO₂ nanosheets with exposed reactive {001} facets

With a combination of transmission electron microscopy and group theory analysis, this article presents a systematic structural investigation of possible monoclinic domain variants in Na₃TiOF₅, which are induced by a ferroelastic phase transition from a high-temperature cubic phase to a low-temperature monoclinic phase.