The phase equilibria of the Cu₂S-SiS₂-GeS₂ system have been studied in the Cu₂S-Cu₈SiS₆-Cu₈GeS₆ composition area. Based on data obtained from differential thermal analysis, powder x-ray diffraction, and SEM-EDS techniques, the T-x diagram of the Cu₈SiS₆-Cu₈GeS₆ boundary system and two internal polythermal sections, as well as the isothermal section at 300 K of the phase diagram and the liquidus surface of the Cu₂S-Cu₈SiS₆-Cu₈GeS₆ system were constructed. The areas of primary crystallization and homogeneity of phases, the nature, and temperatures of invariant and monovariant equilibria were determined. Continuous solid solutions based on both crystalline modifications of the starting compounds of the Cu₈SiS₆-Cu₈GeS₆ boundary system, have been revealed, which are of interest as environmentally friendly functional materials. The temperatures and enthalpies of phase transitions of Cu₈SiS₆ and Cu₈GeS₆ compounds, and Cu₈Si_(1−X)Ge_XS₆ solid solutions were determined using differential scanning calorimetry. The entropies of phase transitions for end-member compounds were also calculated. It is shown that the heats and entropies of phase transitions of these phases are anomalously large in comparison with the thermodynamic functions of ordinary polymorphic transitions. Apparently, this is due to a significant increase in the degree of disorder in the cationic sublattice upon transition to the high-temperature ion-conducting phase. It has also been established that the heats of phase transitions of solid solutions are practically equal to the sum of the corresponding functions of the end-member compounds.

_{在Cu 2} S- Cu ₈ SiS ₆ -Cu ₈ GeS ₆成分领域研究了Cu _{2 S-SiS 2} -GeS ₂体系的相平衡。_{基于差热分析、粉末X射线衍射和SEM-EDS技术获得的数据，获得了Cu 8} SiS ₆ -Cu ₈ GeS ₆边界系统和两个内部多温截面的Tx图，以及在Cu ₂ S-Cu ₈ SiS ₆ -Cu ₈的300 K相图和液相线面构建了GeS _6系统。确定了初级结晶面积和相的均匀性、不变和单变量平衡的性质和温度。已经揭示了基于Cu ₈ SiS ₆ -Cu ₈ GeS _{6边界系统的起始化合物的两种晶体改性的连续固溶体，其作为环境友好的功能材料而受到关注。Cu 8} SiS ₆和 Cu ₈ GeS ₆化合物以及 Cu ₈ Si _{(1− X )} Ge _X的相变温度和相变焓使用差示扫描量热法测定S _{6固溶体。}还计算了端元化合物的相变熵。结果表明，与普通多晶型转变的热力学函数相比，这些相的相变热量和熵异常大。显然，这是由于在转变为高温离子传导相时阳离子亚晶格的无序程度显着增加。还已经确定，固溶体的相变热实际上等于端元化合物的相应函数的总和。