This paper deals with the structural investigation of a new class of glasses belonging to the Ga-Sb-Se system. Neutron diffraction and ⁷⁷Se NMR were performed on the Ga₈Sb₂₇Se₆₅ glass composition to understand the structural network in this unconventional system. The experimental data were confronted to molecular dynamics simulations and show a good agreement. Detailed analyses are consistent with Ga and Se coordination numbers (CN) of 4 and 2, respectively, as usually obtained in chalcogenide glasses. This study also highlights a variable CN of Sb, ranging from 3 up to 5, allowing to better understand the formation of glasses in a such complex system.

本文研究了属于Ga-Sb-Se系统的一类新型眼镜的结构研究。在Ga ₈ Sb ₂₇ Se ₆₅玻璃组成上进行中子衍射和⁷⁷ Se NMR，以了解该非常规系统中的结构网络。实验数据经过分子动力学模拟，显示出良好的一致性。详细分析与通常在硫族化物玻璃中获得的Ga和Se配位数（CN）分别为4和2一致。这项研究还强调了Sb的可变CN，范围从3到5，可以更好地了解这种复杂系统中玻璃的形成。