Fourier transform vibrational spectra of magnesium hydrogenphosphate trihydrate II. The 2000-370 cm-1 region

The Fourier transform infrared and Raman spectra of newberyite, MgHPO4 . 3H (2)O, were studied in the 2000-370 cm-1 region. Also investigated were the spectra of a series of partially deuterated analogues. By comparing the spe ctra recorded at room temperature and those obtained at the boiling tempera ture of liquid nitrogen and by studying the spectra of the series of partia lly deuterated newberyite an assignment was proposed for the observed bands . The spectra are fully in line with the crystallographic data and prove th at the title compound is a true crystalline hydrate and does not contain H3 O+ ions in its structure.