Abstract
The system TeAs 2Te 3SnTe has been investigated by thermal analysis, metallographic, and X-ray procedures. No ternary compounds are formed, but a ternary eutectic exists at 42.0 wt.% Te, 44.0 wt.% As 2Te 3, 14.0 wt.% SnTe, which freezes at 3.58 ± 0.5 °C. An SnTe-rich crystal is the primary phase of precipitation over about 70% of the compositional fields; a Te-rich solid first freezes out over 23% of the diagram and an As 2Te 3-rich phase solidifies from melts covering 7% of the area. Secondary crystallization takes place along the binary valleys which originate at each of the three binary eutectics and terminate by intersecting at the ternary eutectic composition and temperature, where solidification is completed for practically all of the alloys in the system.
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