Iridium(V) fluoride, IrF<sub>5</sub>, is a chemical compound of iridium and fluorine. A highly reactive yellow low melting solid, it has a tetrameric structure, Ir<sub>4</sub>F<sub>20</sub>, which contains octahedrally coordinated iridium atoms. This structure is shared with RuF<sub>5</sub> and OsF<sub>5</sub>. It can be prepared by the controlled decomposition of IrF<sub>6</sub> or the reduction of IrF<sub>6</sub> with silicon powder or H<sub>2</sub> in anhydrous HF.