The phase relations in the system ZnAs2-Ge

Abstract The phase relations in the system ZnAs 2 - Ge were investigated by differential thermal analysis (DTA) and X-ray powder diffraction. Besides the known ternary compound ZnGeAs 2 , another ternary phase of the composition Zn 2 Ge 11 As 4 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 interpretation of the phase relations between 60 and 68 mol% is very complicated. We assume that the phase Zn 2 Ge 11 As 4 is accompanied by two eutectics.