Phase Relations and Properties of Phases in the TlInSe2–TlPrSe2 System

Abstract

The phase diagram of the TlInSe2–TlPrSe2 system was mapped out using differential thermal analysis and x-ray diffraction data. The system was found to contain a partial solid-solution series (0–10 mol % TlPrSe2) and a quaternary compound of composition Tl2InPrSe4. The electrical conductivity, Hall coefficient, and thermoelectric power of TlPrSe2 and Tl2InPrSe4 were measured in the temperature range 300–1100 K. The charge carriers in these compounds were shown to be scattered mainly by longitudinal acoustic phonons.