A Raman spectroscopic study of H/D isotopically substituted hydrous aluminosilicate glasses

✍ Scribed by Paul F. McMillan; Brent T. Poe; Thomas R. Stanton; Richard L. Remmele

• Publisher: Springer-Verlag
• Year: 1993
• Tongue: English
• Weight: 514 KB
• Volume: 19
• Category: Article
• ISSN: 0342-1791
• DOI: 10.1007/bf00203185

✦ Synopsis

We have obtained high quality Raman spectra for two H/D isotopically substituted hydrous aluminosilicate glasses with compositions along the NaA1Si308 -SiO2 join. Consistent with the results of previous studies, the isotope shift for the band near 900 cm-1, whose intensity grows with increasing water content, is extremely small: VH/VD = 1.004 • 0.004. The lack of a definite H/D isotope shift for this band does not, however, preclude its association with a vibration of a hydrous species in the glass, because of likely strong coupling between different vibrational modes of hydrated framework species. The 900 cm-1 band could well be due to a T-OH (T = Si, A1) stretching or bending vibration in the hydrous glass, as required by the presence of a combination band near 4500 cm-1 in near-infrared spectra.