Unit cell of osmium hexafluoride.
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||304.22 g/mol|
|Appearance||yellow crystalline solid|
|Melting point||33.4 °C (92.1 °F; 306.5 K)|
|Boiling point||47.5 °C (117.5 °F; 320.6 K)|
|Pnma, No. 62|
a = 938.7 pm, b = 854.3 pm, c = 494.4 pm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Osmium hexafluoride is made by a direct reaction of osmium metal exposed to an excess of elemental fluorine gas at 300 °C.
Osmium hexafluoride is a yellow crystalline solid that melts at 33.4 °C and boils at 47.5 °C. The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.387 Å, b = 8.543 Å, and c = 4.944 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 5.09 g·cm−3.
Partial hydrolysis of OsF6 produces OsOF4.