Fe4 O2 F6

Fe₄O₂F₆ is an iron oxide fluoride compound belonging to the mixed-anion oxide family, combining iron oxidation states with fluoride substitution to create a semiconductor material. This is largely a research-phase compound; iron fluoride oxides are of interest in battery materials (particularly lithium-ion and solid-state systems) and as precursors for specialized magnetic or catalytic applications, where the fluoride component can modify electronic structure and ionic transport compared to conventional iron oxides. The material represents an emerging class in electrochemistry and materials chemistry rather than an established industrial commodity.