Ammonium hexafluoroferrate

[1][2][3] Ammonium hexafluoroferrate can be obtained by reacting ferric fluoride trihydrate and ammonium fluoride in water.

[4] Ammonium hexafluoroferrate is isomorphous with the analogous compounds of aluminum and trivalent titanium, vanadium, and chromium.

[6] The compound's thermal decomposition products are ferrous fluoride and ferric fluoride.

[7] The compound reacts with xenon difluoride to produce NH4FeF4, N2, Xe, and HF.

[8] Ammonium hexafluoroferrate is used as a fire retardant.