The infrared absorption band at 11.7 μ corresponding to a germanium-oxygen molecular vibration is quantitatively correlated to the chemically determined oxygen content of germanium crystals. The solid solubility of oxygen is determined as a function of temperature and the precipitation of the second phase GeO2 is observed. Crystals containing about 1017 atoms per cm3 of dissolved oxygen have been prepared. The maximum solubility appears to be 2×1018 atoms/cm2. The heat of solution is 1.2 ev. Silicon in a melt of germanium acts as a getter for oxygen, resulting in the formation of SiO2; this observation is in agreement with thermodynamical considerations.
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Kaiser et al. (1961) studied this question.
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