Silver subfluoride

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 fluoride:
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 powder.

Crystal structure

Ag₂F adopts the anti-CdI₂ crystal structure, i.e. the same structure as cadmium iodide, CdI₂, but with "Ag^½+" centres in the I⁻ positions and F⁻ in the Cd²⁺ positions. The shortest distance between silver atoms is 299.6 pm .