Violet tungsten oxide has complex molecular weight, mainly includes [WO6] and [WO7]. [WO6] is octahedral structure, every tungsten ion is close to six oxygen ion, tungsten ion is in the middle, every oxygen ion is close to the two tungsten ions. [WO7] is decahedron structure, similar to [WO6], tungsten ion is in the center and closed to 7 cations, every oxygen ion is closed to the two tungsten ions.
Molecular structure, or molecular shape, is based on spectroscopic data to describe the three-dimensional arrangement of atoms in the molecule. To a large extent, the molecular structure affects the reactivity, polarity, phase, color, magnetism and biological activity of chemical substances.