The better glass forming ability of GeS_2-Ga_2S_3-CdI_2 system was found compared to that of GeS_2-Ga_2S_3-PbI_2.

• 两个体系都是在富GeS_2区域形成玻璃，GeS_2-Ga_2S_3-CdI_2玻璃要比GeS_2-Ga_2S_3- PbI_2玻璃更容易制备。