Osmium heptafluoride is an inorganic chemical compound of

osmium Osmium (from Greek grc, ὀσμή, osme, smell, label=none) is a chemical element with the symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mos ...

metal and

fluorine Fluorine is a chemical element with the symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as a highly toxic, pale yellow diatomic gas. As the most electronegative reactive element, it is extremely reacti ...

with the chemical formula . It was first reported in 1966 by the reaction of fluorine and osmium at 600 °C and 400 atm, but later experiments can’t reproduce this compound.

Physical properties

Osmium(VII) fluoride forms a bluish-yellow hygroscopic substance, extremely unstable. The compound starts decomposing at –100 °C. It should be stored in a nickel vessel at the temperature of

liquid nitrogen Liquid nitrogen—LN2—is nitrogen in a liquid state at low temperature. Liquid nitrogen has a boiling point of about . It is produced industrially by fractional distillation of liquid air. It is a colorless, low viscosity liquid that is wide ...

Chemical properties

Osmium heptafluoride decomposes to

osmium hexafluoride Osmium hexafluoride, also osmium(VI) fluoride, (OsF6) is a compound of osmium and fluorine, and one of the seventeen known binary hexafluorides. Synthesis Osmium hexafluoride is made by a direct reaction of osmium metal exposed to an excess o ...

when slightly heated: ::

References

Osmium compounds Fluorides Metal halides Hypothetical chemical compounds {{inorganic-compound-stub