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

The phase diagram of the Ag-Ag2Te-In2Te3-In system was studied by DTA, DSC, XRD, metallography and electron microprobe methods. With the exception of the three known compounds, AgInTe2, AgIn5Te8 and Ag3In97Te147 that are loca lized in the Ag2Te-In2Te3 quasi-binary section, no other ternary compounds are identified. The eutectic valleys are drawn, and the nature and the loca tion of the ternary invariants are given. Twelve ternary invariants are fou nd: three eutectic points, eight transitory peritectic points and one metat ectic point. One ternary liquid-liquid miscibility gap is identified: it or iginates from the Ag-Ag2Te system and overlaps a large region of the Ag-Ag2 Te-InTe-In system; it is crossed by a eutectic valley, giving a first-class ternary monotectic equilibrium. No glassy region is observed. (C) 1999 Els evier Science S.A. All rights reserved.