An Updated Phase Diagram of the SnTe-Sb2Te3 System and the Crystal Structure of the New Compound SnSb4Te7

Seidzade A. E., Orujlu E. N., Doert T., Amiraslanov I. R., Aliev Z. S., Babanlı M.

Journal of Phase Equilibria and Diffusion, vol.42, no.3, pp.373-378, 2021 (SCI-Expanded, Scopus) identifier

  • Nəşrin Növü: Article / Article
  • Cild: 42 Say: 3
  • Nəşr tarixi: 2021
  • Doi nömrəsi: 10.1007/s11669-021-00888-8
  • jurnalın adı: Journal of Phase Equilibria and Diffusion
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Səhifə sayı: pp.373-378
  • Açar sözlər: crystal structure, phase diagram, SnTe-sb2te3 system, solid solutions, topological insulators, van der waals compound
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

The phase equilibria in the SnTe-Sb2Te3 system were re-investigated by a combination of Differential Thermal Analysis (DTA), Powder x-ray Diffraction (PXRD), and Scanning Electron Microscope equipped with Energy Dispersive x-ray Spectrometer (SEM-EDS) techniques. In an earlier reported version, this phase diagram was described as quasi-binary with only one intermediate compound, namely SnSb2Te4. Here we report the existence of the new van der Waals type compound SnSb4Te7 for the first time. Considerable homogeneity ranges for both ternary compounds are also revealed. According to DTA results, peritectic melting was found for both compounds. The corresponding temperatures were found to be 595 and 593 °C for SnSb2Te4 and SnSb4Te7, respectively. The PXRD pattern of the newly found phase was analyzed through the Rietveld method and the crystal structure was solved. In the considered quasi-binary system, two wide solid-solubility areas based on the constitutive compounds were also revealed.