THE TLPbTe3-TbGdTe6-TbBiTe6 ISOPLETH SECTION OF THE Tl-Pb-Bi-Gd-Te SYSTEM
The purpose of this study was to investigate the phase relations in the Tl-Pb-Gd-Te quaternary system on the Tl<sub>9</sub>GdTe<sub>6</sub>-Tl<sub>9</sub>BiTe<sub>6</sub>-Tl<sub>4</sub>PbTe<sub>3</sub> composition area. Based on the results of the differential thermal analysis, the powder X-ray diffraction technique and the microhardness measurements, it revealed that the system is characterized by unlimited solid solutions crystallized in Tl<sub>5</sub>Te<sub>3</sub> structure type.