Abstract
The broadening of the X-ray diffraction lines which occurs when the crystals composing the specimen are smaller than about 10-5cm. edge length is well known. Since the discovery of this phenomenon by Scherrer in 1920 a fair amount of work has been done on the determination of the particle size from the breadth of the lines. Scherrer (1920), Bragg (1933) and Seljakow (1925) have calculated the diffraction broadening for crystals of cubic form belonging to the cubic system. For parallel monochromatic radiation and a point specimen, they agree upon a formulaβx=Cλ/t cos 1/2χ, whereβx= angular breadth of the line defined below,t— edge length of cubic crystal, λ= wave-length of X-radiation, 1/2χ=θ, the Bragg angle. The values given for the constantCare 0·94, 0·89 and 0·92 respectively.
Reference9 articles.
1. Bragg 1933 " Crystalline State" 1 189.
2. Brill 1928 Z .Krystallogr. 68 387. - 1930 Z .Krystallogr. 75 217.
3. Z;Pelzer Brill;Krystallogr.,1929
4. Cam eron a n d P a tte rso n 1937 A m erican Society for T esting M aterials. " Sym posium on R ad io g rap h y an d X -ray D iffraction 1937."
5. Trans;H;Faraday Soc.,1936
Cited by
406 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献