Iridium hexafluoride

Iridium hexafluoride

Yellow crystalline solid

Fixed

5.11 g · cm -3 ( -140 ° C)

44 ° C.

53.6 ° C

Template: Infobox chemical / molecular formula search available

Iridium (VI ) fluoride ( IrF6 ), often Iridium hexafluoride, is a chemical compound of the elements iridium and fluorine and belongs to the group of hexafluoride.

Representation

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

Properties

Iridium hexafluoride is a yellow crystalline solid which melts at 44 ° C and boils at 53.6 ° C. He is in the form of bright yellow shining leaflets and needles which are intensely golden yellow and glassy above -15 ° C. It is very hygroscopic, attacks glass. Platinum is corroded from 400 ° C. Halogens reduce it at room temperature to iridium (IV ) fluoride. It crystallizes in the orthorhombic crystal system (measured at -140 ° C) in the space group Pnma with the lattice parameters a = 941.1 pm, b = 854.7 pm and c = 495.2 pm and four formula units per unit cell with a calculated density of 5.11 g · cm -3. The IrF6 molecule is octahedral ( Oh); the Ir -F bond length is 183.3 pm.