THE PHASE-RELATIONS IN THE SYSTEM ZNAS2-GE

The phase relations in the system ZnAs2-Ge were investigated by differ ential thermal analysis (DTA) and X-ray powder diffraction. Besides th e known ternary compound ZnGeAs2, another ternary phase of the composi tion Zn2Ge11As4 with disordered zincblende structure was found, which was unknown until now. Since the eutectic and melting point of the new ternary compound differ by only a few degrees, a complete interpretat ion of the phase relations between 60 and 68 mol% is very complicated. We assume that the phase Zn2Ge11As4 is accompanied by two eutectics.