Which Metal Ions Form Complexes with Ammonium Paratungstate? 2023-02-24 Tungsten Oxide 141 Ammonium paratungstate can form complexes with many metal ions, such as Fe3+, Co2+, Ni2+, Cu2+, etc. These complexes have different colors and chemical properties, and can be used in chemical analysis, catalysts and other fields. 0 0 ammonium paratungstatemetal ions