SYNTHESIS AND CRYSTAL STRUCTURE OFA NEW 9P–TYPE LAYERED van der WAALSCOMPOUND SnBi4Te4 YENİ 9P-TİP LAYLI SnBi4Te4 van der VAALS BİRLƏŞMƏSİNİN SİNTEZİ VƏ KRİSTAL QURULUŞU СИНТЕЗ И КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА НОВОГО СЛОИСТОГО ВАНДЕР-ВААЛЬСОВОГО СОЕДИНЕНИЯ SnBi4Te49 Р-ТИПА

Orujlu E., Seidzade A., Aliev Z., Amiraslanov I., Babanlı M.

Chemical Problems, vol.18, no.1, pp.40-48, 2020 (ESCI, Scopus) identifier

  • Nəşrin Növü: Article / Article
  • Cild: 18 Say: 1
  • Nəşr tarixi: 2020
  • Doi nömrəsi: 10.32737/2221-8688-2020-1-40-48
  • jurnalın adı: Chemical Problems
  • Jurnalın baxıldığı indekslər: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier
  • Səhifə sayı: pp.40-48
  • Açar sözlər: Bi-bilayers, crystal structure, novel layered chalcogenide, Rietveld method, Sn-Bi-Te ternary system, SnBi4Te4, topological insulator, van der Waals compounds
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

Considering structural features of the already known tetradymite-like layered chalcogenide phases, we have attempt to synthesize a new mix-layered compound, SnBi4Te4. The newly synthesized alloy examined by means of differential thermal analysis, powder X-ray diffraction and scanning electron microscope techniques.The melting nature of the discovered phase is found to be incongruently at 831 K. The crystal structure of the SnBi4Te4 was elucidated from powder pattern by Rietveld method. The determined crystal structure was found to derived from tetradymite type and featured by the alternation of theseven-layered (septuple) blocks of SnBi2Te4 and bismuth bilayers. The result of this work, the existence of a new - SnBi4Te4 compound in the Sn-Bi-Te ternary systemcan shed light for the incoming research works to search for similar phases in the other releated AIV-Bi-Te (AIV = Ge, Sn, Pb ) systems.