Silver subfluoride is the inorganic compound with the formula Ag2F.

This is an unusual example of a compound where the oxidation state of silver is fractional.

The compound is produced by the reaction of silver and silver(I) fluoride:[1] It forms small crystals with a bronze reflex and is a good conductor of electricity.

On contact with water almost instant hydrolysis occurs with the precipitation of silver (Ag) powder.

Ag2F adopts the anti-CdI2 crystal structure, i.e. the same structure as cadmium iodide, CdI2, but with "Ag½+" centres in the I− positions and F− in the Cd2+ positions.