Osmium octafluoride

Osmium octafluoride is an inorganic chemical compound of osmium metal and fluorine with the chemical formula OsF8. Some sources consider it to be a still hypothetical compound. An early report of the synthesis of OsF8 was much later shown to be a mistaken identification of OsF6. Theoretical analysis indicates OsF8 would have an approximately square antiprismatic molecular geometry.

Potential synthesis
Rapid cooling of fluorine and osmium reaction products:


 * Os + 4 F2 → OsF8