FeF

FeF is an iron fluoride compound in the metal class, representing a transition metal fluoride that combines iron with fluorine. While not a conventional structural metal, iron fluorides are primarily of interest in electrochemistry and materials research rather than traditional engineering applications. This compound and its family are investigated for energy storage systems (particularly lithium-ion and fluoride-ion batteries) and catalytic applications, where the fluoride coordination can modify electronic properties compared to oxide or chloride alternatives.