Technetium pentafluoride is a binary inorganic chemical compound of technetium metal and fluorine with the chemical formula .
The compound can be synthesised by heating of technetium powder in a jet of fluorine diluted with nitrogen:
Another way to prepare it is the effect of iodine on technetium hexafluoride solution in iodine pentafluoride:
Technetium pentafluoride forms yellow crystals of the orthorhombic crystal system. It reacts with water, and is volatile.
The compound is hydrolyzed by water, disproportionating to more stable technetium compounds: