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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >The coordination number calculation from total structure factor measurements
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The coordination number calculation from total structure factor measurements

机译：根据总结构因子测量值计算配位数

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摘要

In the structural characterization of amorphous materials, the knowledge of the correlation distances and coordination numbers has a key importance. When several correlation distances overlap in the same diffractogram, obtaining the coordination numbers is a quite difficult task. In this work the method to obtain coordination numbers from total structure factor measurements is described in detail. The procedure is focussed in neutron diffraction experiments, but it is also applicable for X-ray diffraction. In order to illustrate the method, it was chosen as example a chalcogenide glass (Ag25Ge18.75Se56.25), a member of a series of ionic conductors that have been studied by neutron diffraction. In particular, the coordination numbers corresponding to the first diffraction peak, involving Ge-Se and Se-Se correlations, are discussed.
机译：在非晶材料的结构表征中，相关距离和配位数的了解至关重要。当几个相关距离在同一衍射图中重叠时，获得配位数是非常困难的任务。在这项工作中，详细描述了从总结构因子测量中获得配位数的方法。该过程集中在中子衍射实验中，但它也适用于X射线衍射。为了说明该方法，以硫属化物玻璃（Ag25Ge18.75Se56.25）为例，该硫属化物玻璃是通过中子衍射法研究的一系列离子导体的成员。特别地，讨论了涉及Ge-Se和Se-Se相关性的对应于第一衍射峰的配位数。

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