An Updated Phase Diagram of the SnTe-Sb2Te3 System and the Crystal Structure of the New Compound SnSb4Te7
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
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.
Details
Original language | English |
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Pages (from-to) | 373-378 |
Number of pages | 6 |
Journal | Journal of phase equilibria and diffusion |
Volume | 42 |
Issue number | 3 |
Publication status | Published - Jun 2021 |
Peer-reviewed | Yes |
External IDs
Scopus | 85107527552 |
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ORCID | /0000-0001-7523-9313/work/142238553 |
Keywords
ASJC Scopus subject areas
Keywords
- crystal structure, phase diagram, SnTe-sb te system, solid solutions, topological insulators, van der waals compound