RAMAN-SPECTRA OF HYDROGEN MOLYBDENUM BRONZE, H0.30MOO3

The Raman spectra of hydrogen molybdenum bronze, H0.30MoO3, named as Type I, were studied. Four bands observed at 1011, ca. 750, ca. 670, and 452 cm-1 were assigned to the Mo-O1, Mo-O3′, Mo-O2′, and Mo-O2 stretching vibrations, respectively. These assignments suggest that the structural change from MoO3 to Type I induces a shift of the Mo-O1 stretching vibrations to a higher frequency and shifts of the Mo-O3′ and Mo-O2 stretching vibrations to lower frequencies. The frequencies of the Mo-O2′ stretching vibrations were scarcely influenced. These spectral changes were understood on the basis of the changes in the bond length of Type I presented by Dickens et al. © 1992 Academic Press, Inc.