Abstract

The Pt–Sb–Te system has been investigated at 600 °C, using sealed glass capsule techniques. The alloys were studied by X-ray diffraction, electron probe microanalysis and reflected light microscopy. At 600 °C, platinum, Pt 5Sb, Pt 3Sb, Pt 3Sb 2, PtSb, PtSb 2, Pt 2Te 3, Pt 3Te 4, PtTe, PtTe 2 Sb 2Te 3 and antimony are the stable solid phases. No ternary phases of Pt–Sb–Te were found in the system. Appreciable solid solubility was measured in some constituent binary Pt–Sb and Pt–Te compounds. The existence of the Pt 5Sb phase was re-confirmed. X-ray powder diffraction data of Pt 5Sb and Pt 3Sb were indexable on the basis of tetragonal cells with a=3.948(3), c=16.85(1) Å and a=3.9455(7), c=16.959(5) Å, respectively. Some physical and optical properties of the synthetic phases in the system are also reported.

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