Infrared and Raman study of WO3 tungsten trioxides and WO3, xH2O tungsten trioxide tydrates

The infrared and Raman spectra of powder samples of WO3 (monoclinic and hexagonal) and of WO3, xH2O (x = 1,2,13) have been recorded and the most characteristic vibrations are discussed with reference to the available structural data. In particular, a correlation has been established between the force constant and the length of the WO bond.