Abstract
We report the polarized Raman spectra of vitreous prepared by steam oxidation of Si in O. This yields the → isotope shifts for all Raman- and nearly all infrared-active modes. The shifts of network vibrations agree very well with the predictions of a recently introduced nearest-neighbor central-force ideal continuous-random-network model, and thus confirm the utility of that simple model. The unexplained Raman-active "defect" lines reported at 495 and 606 in ordinary fused silica are shown to involve little or no silicon motion.
- Received 28 October 1980
DOI:https://doi.org/10.1103/PhysRevB.23.5527
©1981 American Physical Society