The phase diagram of the system tellurium/arsenic

Abstract

Thermal analysis, metallographic and X-ray procedures have been used to investigate the system tellurium/arsenic. As₂Te₃ is the only binary compound present. It melts at 381° C and forms a eutectic with tellurium at 18.5 wt % As/81.5 wt % Te and at a temperature of 363° C. The As₂Te₃ and As also produce a eutectic at 31.5 wt % As/68.5 wt % Te, with a melting point of 380°C. The solid solubilities at the As and Te ends of ths phase diagram are too small to detect by the methods used, and the compositional range of the As₂Te₃ is very restricted.