Untersuchungen zum chemischen Transport intermetallischer Phasen, I: GeTe, SnTe, PbTe / Investigations on the Chemical Transport of Intermetallic Phases, I: GeTe, SnTe, PbTe

GeTe, SnTe, and PbTe have been prepared by chemical transport reactions with iodine as transport agent in the temperature range between T2(800 - 700°C) and T1(700 - 500°C). The effective transport equilibria were determineted. Total pressure measurements in the system Ge- Te-I give the coexistence equlibria for condensed phases, and also for the gasphase equilibra. GeTe4exists only as a metastable phase at lower temperatures and decom poses near 260°C in GeTe and Te.