It is present as an olive green to black, odorless solid.

The compound can be produced by any one of three primary chemical conversion processes, involving either uranium tetrafluoride (UF4) or uranyl fluoride (UO2F2) as intermediates.

[citation needed] Using a 6Å × 6Å × 6Å box with the uranium atom in the centre, the bond valence calculation was performed for both U1 and U2 in solid.

It was found, using the parameters for U(VI), that the calculated oxidation states for U1 and U2 are 5.11 and 5.10.

[citation needed] Other studies have shown evidence that a two U5+ and a single U6+, or other similar combinations, may be a more correct representation.