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The internal friction of germanium has been measured as a function of temperature at 100 kc/sec. There is a peak at 420^∘{}C and little further rise to within a few degrees of the melting point. A specimen strained in tension shows a rapid rise with temperature above 500^∘{}C. These results are compared with those of Kessler and it is suggested that the high-temperature rise found in all his specimens is due to thermal stressing. A small peak at 770^∘{}C is attributed to the presence of oxygen in the germanium.
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P. D. Southgate (1958) studied this question.
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