SOLID-PHASE EQUILIBRIA DIAGRAM OF THE TL2 TE-TLTBTE2-TLSBТE2 SYSTEM
New Materials, Compounds and Applications, vol.4, no.2, pp.99-107, 2020 (Scopus)
- Publication Type: Article / Article
- Volume: 4 Issue: 2
- Publication Date: 2020
- Journal Name: New Materials, Compounds and Applications
- Journal Indexes: Scopus
- Page Numbers: pp.99-107
- Keywords: crystal lattice, phase diagram, powder X-ray diffraction, solid solutions, Tl2Te-TlSbТe2-TlTbTe2 system, topological insulators
- Open Archive Collection: Article
- Azerbaijan State University of Economics (UNEC) Affiliated: Yes
Abstract
The phase relations in the Tl2Te-TlTbTe2-TlSbТe2 composition area of the Tl-Sb-Te-Te quaternary system were investigated by using the differential thermal analysis and powder X-ray diffraction technique. The diagram of solid-phase equilibria at room temperature of this system is constructed. It was determined that the system is characterized by the formation of solid solutions based on TlTbТe2 b(1-phase), TlSbTe2 b(2-phase), and δ –phase (continuous solid solutions in the Tl9TbTe6-Tl9SbTe6 bsystem). Between the above-mentioned phases, the two-phase (1b+ δ and2b+ δ) are formed, which are limited by1b+2+ δ three-phase area. The types and lattice parameters of some samples are calculated.