Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, USA.
J Phys Condens Matter. 2010 Oct 13;22(40):405401. doi: 10.1088/0953-8984/22/40/405401. Epub 2010 Sep 20.
High-energy x-ray diffraction is employed to study the atomic structure of bulk Ge(x)As(2x)Te(100-3x) glasses with compositions in the range 25 ≤ 3x ≤ 70. The coordination environments of Te atoms suggest significant violation of chemical order in these glasses. Analyses of the nearest-neighbor coordination environments and the parameters for the first sharp diffraction peak indicate that these telluride glasses are structurally and chemically more disordered as compared with their sulfide or selenide analogs. The compositional evolution of the structural parameters is shown to be consistent with the corresponding variation in molar volume and glass transition temperature.
采用高能 X 射线衍射研究了组成范围为 25 ≤ 3x ≤ 70 的大块 Ge(x)As(2x)Te(100-3x)玻璃的原子结构。Te 原子的配位环境表明这些玻璃中存在明显的化学无序。对最近邻配位环境和第一尖锐衍射峰参数的分析表明，与硫属化物或硒化物类似物相比，这些碲化物玻璃在结构和化学上更加无序。结构参数的组成演化与摩尔体积和玻璃化转变温度的相应变化一致。
