Direct single-temperature method has been employed to synthesize 137 samples of the Cu₂Se-GeSe₂-As₂Se₃ system. The samples have been investigated by x-ray diffraction and differential thermal analysis. The isothermal section at 513 K (240 °C), two phase diagrams GeSe₂-As₂Se₃ and Cu₂GeSe₃-As₂Se₃, four vertical sections Cu₂GeSe₃-CuAsSe₂, Cu₈GeSe₆-CuAsSe₂, Cu₈GeSe₆-As₂Se₃, A-B (A = 85 mol.% GeSe₂-15 mol.% Cu₂Se; B = 85 mol.% As₂Se₃-15 mol.% Cu₂Se), and the liquidus surface projection onto the concentration triangle have been constructed. The existence of the ternary compounds Cu₂GeSe₃, Cu₈GeSe₆ and CuAsSe₂ have been confirmed. The fields of the primary crystallization of phases, character, temperatures and coordinates of nonvariant points have been determined.

中文翻译：

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准三元体系Cu 2 Se-GeSe 2 -As 2 Se 3

直接单温方法已被用于合成的Cu 137个样品₂硒GESE ₂ -As ₂硒₃系统。样品已通过X射线衍射和差热分析进行了研究。在513 K（240℃）的等温截面，二相图GESE ₂ -As ₂硒₃和Cu _2名GESE ₃ -As ₂硒₃，四个垂直部分的Cu ₂ GESE ₃ -CuAsSe ₂，铜₈ GESE ₆ -CuAsSe ₂，铜₈ GeSe ₆-As ₂ Se ₃，A - B（A  = 85摩尔％GeSe ₂ -15摩尔％Cu ₂ Se; B  = 85摩尔％As ₂ Se ₃ -15摩尔％Cu ₂ Se）和液相线已经构建了到浓度三角形的表面投影。已经证实存在三元化合物Cu ₂ GeSe ₃，Cu ₈ GeSe ₆和CuAsSe ₂。已经确定了相的初次结晶场，特征，温度和不变点的坐标。