The phase eqilibria in the Pb–Bi–Te–Se quaternary system along the PbBi₂Te₄–²PbBi₂Se₄² isopleth section was investigated experimentally using differential thermal analysis and X-ray diffraction analyses of the equilibrated alloys. It was shown that the system is non-quasi-binary one and featured by the formation of the tetradymite-type solid solutions based on the PbBi₂Te₄ in the wide range of concentration. The system has a more complex phase equilibria scheme that comes from its host reciprocal PbTe–PbSe–Bi₂Se₃–Bi₂Te₃ system. One can see that, in order to reveal the phase equilibria scheme and understand the crystallization scheme, reactions types etc., the thorough investigation of the entire pointed reciprocal PbTe–PbSe–Bi₂Se₃–Bi₂Te₃ system is very important

doi.org/10.32737/0005-2531-2019-4-54-58