Osmium hexafluoride

Osmiumhexafluorid

Yellow crystalline solid

Fixed

5.09 g · cm -3 ( -140 ° C)

33.4 ° C

47.5 ° C

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Osmium (VI ) fluoride ( OsF6 ), often also Osmiumhexafluorid, is a chemical compound of the elements osmium and fluorine, and belongs to the group of hexafluoride.

Representation

Osmiumhexafluorid is by direct reaction of the metal in an excess of elemental fluorine (F2 ) are shown at 300 ° C.

Properties

Osmiumhexafluorid is a yellow crystalline solid which melts at 33.4 ° C and boils at 47.5 ° C. It crystallizes in the orthorhombic crystal system (measured at -140 ° C) in the space group Pnma with the lattice parameters a = 938.7 pm, b = 854.3 pm and c = 494.4 pm and four formula units per unit cell with a calculated density of 5.09 g · cm -3. The OsF6 molecule is octahedral ( Oh); the Os -F bond length is 182.7 pm.