Conversion of perovskite to anatase and TiO₂ (B): a TEM study and the use of fundamental building blocks for understanding relationships among the TiO₂ minerals

TiO₂ crystallizes in a least seven modifications encompassing several major structure types including those of rutile, hollandite, and PbO₂. A fundamental building block (FBB) approach has been adapted in order to understand better the relationships between these structures. The identification of common structural elements provides insights into possible phase transformation mechanisms as well as the weathering reactions that convert perovskite (CaTiO₃) to TiO₂ anatase and TiO₂ (B). -from Authors