New Thallium Dysprosium Tellurides and Phase Equilibria in the System Tl2Te–Tl5Te3–Tl4DyTe3

İMAMƏLİYEVA S., Babanly D., Gasymov V., Babanlı M.

Russian Journal of Inorganic Chemistry, vol.66, no.4, pp.558-568, 2021 (SCI-Expanded, Scopus) identifier

  • Nəşrin Növü: Article / Article
  • Cild: 66 Say: 4
  • Nəşr tarixi: 2021
  • Doi nömrəsi: 10.1134/s0036023621040124
  • jurnalın adı: Russian Journal of Inorganic Chemistry
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Metadex
  • Səhifə sayı: pp.558-568
  • Açar sözlər: crystal lattice, liquidus surface, phase equilibria, solid solutions, thallium dysprosium tellurides
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

Abstract: The existence of the ternary compounds Tl9DyTe6 and Tl4DyTe3 was predicted and their synthesis was performed based on the analysis of structural features of Tl5Te3. It was shown that both compounds are ternary structural analogs of Tl5Te3 (space group I4/mcm) and have the following unit cell parameters of the tetragonal lattices: a = 8.8781(7) Å, c = 12.9762(14) Å, Z = 2 (Tl9DyTe6) and a = 8.8588(9) Å, c = 13.0524(16) Å, Z = 4 (Tl4DyTe3). To determine the primary crystallization fields and homogeneity regions of these compounds, phase equilibria in the Tl–Dy–Te system were studied in the composition region Tl2Te–Tl5Te3–Tl4DyTe3. The phase diagrams of various subsystems were constructed and analyzed, namely, the phase diagrams of the lateral constituents Tl5Te3–Tl4DyTe3 and Tl2Te–Tl4DyTe3, some internal polythermal sections, the isothermal section of the phase diagram at 300 K, and projections of the liquidus and solidus surfaces. It was found that the homogeneity region of solid solutions with the Tl5Te3 structure includes the stoichiometric compositions of the compounds Tl9DyTe6 and Tl4DyTe3, and occupies most (more than 90%) of the area of the concentration triangle Tl2Te–Tl5Te3–Tl4DyTe3.