Partial Pressures of Zn and Te2 over ZnTe up to 917°C

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Abstract
The partial pressures of Zn, , and of Te2, , for of different compositions have been determined up to 917°C by measuring the optical density of the coexisting vapor as a function of wavelength in the uv and visible. Over the whole temperature range the value of over is the same as that over pure Zn to within the experimental error of ±2%. The values of for indicate a solubility of Zn in Te(c) at 450°C of the order of 1 a/o (atomic per cent). For compositions within the homogeneity range both and were measured. Evidence is presented for a slow reaction with silica near 900° by which Zn is lost from the but which can be inhibited by a carbon coating on the silica tube. Between 688° and 917°C with a standard deviation of 0.016 in the logarithm. The result is compared with published values, which spread over a factor of 10 in .

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