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.

通过差热分析 (DTA)、粉末 X 射线衍射 (PXRD) 和配备能量色散 X 射线光谱仪 (SEM) 的扫描电子显微镜的组合，重新研究了 SnTe-Sb ₂ Te ₃系统中的相平衡-EDS) 技术。在较早的报道版本中，该相图被描述为只有一种中间化合物的准二元相图，即 SnSb ₂ Te ₄。在这里我们报告了新的范德华型化合物 SnSb ₄ Te _{7 的存在}首次。还揭示了两种三元化合物的相当大的同质性范围。根据 DTA 结果，两种化合物均发现包晶熔化。发现SnSb ₂ Te ₄和SnSb ₄ Te ₇的相应温度分别为595℃和593℃ 。通过 Rietveld 方法分析新发现的相的 PXRD 图案，并解析出晶体结构。在所考虑的准二元系统中，还揭示了基于本构化合物的两个宽固溶度区域。