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Three infrared absorption bands have been correlated with the oxygen concentration of silicon. Spectra taken between 4. 2^ and 297^ show an unusual temperature-dependent fine structure in the most intense band at 1106 cm^-1. Isotopic shifts of two bands have been observed at low temperatures in samples enriched with O^18. These results can be explained by a model in which interstitial oxygen is bonded to two adjacent silicon atoms in a nonlinear Si-O-Si unit. Observations on samples with different history indicate a direct but complicated dependence of some growth-dependent variables on oxygen concentration.
Hrostowski et al. (Thu,) studied this question.