
Tungsten trioxide (chemical formula: WO3) is an important inorganic compound with the following characteristics: I. Physical Properties Appearance and Color: It is usually yellow in powder form, and its color may change from light to dark when heated. Crystal Structure: It has an octahedral structure, with tungsten atoms located at the center and oxygen atoms positioned at the vertices of the eight faces. It undergoes transitions between tetragonal, orthorhombic, monoclinic, and triclinic crystal phases at different temperatures. Density and Melting…