A newly refined version of the phase diagram of the PbTe–Bi₂Te₃ pseudo-binary system was construc-ted using differential thermal analysis (DTA) and X-ray diffraction (XRD) techniques. It was established that the system forms three tetradymite-type layered ternary compounds, namely PbBi₂Te₄, PbBi₄Te_7, and PbBi₆Te₁₀, and all these phases melt with peritectic decomposition. However, earlier reported Pb₃Bi₄Te₉, Pb₂Bi₆Te₁₁, and PbBi₈Te₁₃ compounds were not confirmed in our XRD studies. The existence of homogeneity areas based on all ternary compounds and the starting phases PbTe and Bi₂Te₃ was detected. The crystal structure of the ternary compounds was solved by Rietveld refinement. The newly constructed phase diagram provides very valuable information for choosing appropriate conditions for the synthesis of bulk samples or single crystals growth

doi.org/10.32737/0005-2531-2022-2-47-53