User:Graeme Bartlett/fluoropnictides

The fluoropnictides are mixed anion compounds that contain both fluoride and phosphide, arsenide, antimonide or bismuthide anions (F− and N3−, P3−, As3− Sb3−, Bi3−).

Many of these are semiconductors. Those that contain iron may be ferromagnetic. Research into these compounds is motivated by the existence of the structurally simlar oxyarsenide superconductors.

Arsenic
Many arsenic fluorides crystallize in the tetragonal system, and those containing iron are superconductors.