Ammonium hexafluoroindate is an inorganic chemical compound with the chemical formula (NH4)3InF6.
[1][2] The compound can be obtained by reacting ammonium fluoride and indium bromide in anhydrous methanol, or by reacting ammonium fluoride and indium fluoride in aqueous solution.
[3] Also, a reaction involving indium hydroxide and ammonium fluoride:[4] The compound decomposes at 120–170 °C to obtain NH4InF4, and further decomposes to InF3 at 185–300 °C.
[5] Ammonium hexafluoroindiate forms colorless crystals of tetragonal system, space group P4mnc,[6] insoluble in water.
[4] At 80 °C, a phase transition into the cubic phase occurs.