Study of the Ag-In-Te ternary system. II. Description of the quadrilateral Ag-Ag2Te-In2Te3-In

Abstract The phase diagram of the Ag–Ag 2 Te–In 2 Te 3 –In system was studied by DTA, DSC, XRD, metallography and electron microprobe methods. With the exception of the three known compounds, AgInTe 2 , AgIn 5 Te 8 and Ag 3 In 97 Te 147 that are localized in the Ag 2 Te–In 2 Te 3 quasi-binary section, no other ternary compounds are identified. The eutectic valleys are drawn, and the nature and the location of the ternary invariants are given. Twelve ternary invariants are found: three eutectic points, eight transitory peritectic points and one metatectic point. One ternary liquid–liquid miscibility gap is identified: it originates from the Ag–Ag 2 Te system and overlaps a large region of the Ag–Ag 2 Te–InTe–In system; it is crossed by a eutectic valley, giving a first-class ternary monotectic equilibrium. No glassy region is observed.