Effect of Iodine Content on the Lattice Parameter of PbTe1 − xIx Solid Solutions

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The lattice parameter of PbTe1 − xIx solid solutions is shown to be a nonmonotonic function, with a sharp minimum, of iodine content. This finding is interpreted in terms of a defect formation model. The model is also used to evaluate the radii of Pb and Te vacancies in PbTe.

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