Fourier analysis of X-ray patterns of soda-silica glass
Fourier analysis of X-ray patterns of soda-silica glass
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DOI：
10.1111/j.1151-2916.1938.tb15774.x
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发表时间：
1938-07-01
影响因子：
3.9
通讯作者：
Biscoe, J
中科院分区：
文献类型：
--
作者：
Warren, BE;Biscoe, J
摘要获得了五种钠硅玻璃成分的X射线衍射图谱。这些图案是在一个真空相机中制作的，使用的是通过岩盐反射而单色化的MoKα辐射。这些图案显示随着苏打含量的增加，外观完全连续地变化。通过对X射线散射曲线的傅立叶分析，获得了五种玻璃的径向分布曲线。分布曲线唯一地确定了几个重要的点。每个硅原子被4个氧包围，距离约为1.62埃，每个钠原子被6个氧包围，距离约为2.35埃。玻璃中存在简单的离散分子，如SiO2、NaaO、Na2Si2O6和Na2SiO3，这些分子被分布曲线唯一地排除了。X射线结果导致钠硅玻璃的以下图片。每个硅被4个氧以约1.62A的距离四面体地包围。部分氧键合到2个硅上，部分仅键合到1个硅上。钠离子Na+排列在硅氧网络中的各个孔中，平均被约6个氧以2.35 A的距离包围。虽然这是一个明确的结构方案，但它并不以规则的间隔重复相同，因此该材料是非结晶的。
AbstractX‐ray diffraction patterns were obtained for five compositions of soda‐silica glass. The patterns were made in an evacuated camera, using MoKα radiation monochromated by reflection from rock salt. The patterns show a perfectly continuous change in appearance with increasing soda content. From a Fourier analysis of the X‐ray scattering curves, radial distribution curves for the five glasses were obtained. The distribution curves uniquely establish several important points. Each silicon atom is surrounded by 4 oxygens at a distance of about 1.62A and each sodium by about 6 oxygens at 2.35A. The existence in the glass of simple discrete molecules, such as SiO2, NaaO, Na2Si2O6, and Na2SiO3, is uniquely ruled out by the distribution curves.The X‐ray results lead to the following picture of soda‐silica glass. Each silicon is tetrahedrally surrounded by 4 oxygens at a distance of about 1.62A. Part of the oxygens are bonded to 2 silicons and part only to 1 silicon. The sodium ions Na+are arranged in various holes in the silicon‐oxygen network, being surrounded on the average by about 6 oxygens at a distance 2.35A. Although this is a definite scheme of structure, it does not repeat identically at regular intervals, and the material, therefore, is noncrystalline.