
Like sodium tungsten bronze (Na?WO?) and potassium tungsten bronze (K?WO?), ammonium tungsten bronze ((NH?)?WO?) is also a type of tungsten bronze. Although Na?WO?, K?WO?, and (NH?)?WO? share similar crystal structures, such as cubic or tetragonal forms, their physicochemical properties and applications differ slightly due to the varying elements added. In terms of chemical composition, ammonium tungsten bronze is a non-stoichiometric compound composed of tungsten, nitrogen, hydrogen, and oxygen, known in English as ammonium tungsten bronze (ATB), with the chemical formula…