Intercrystallite Distance

Assuming that the scatter are the crystaUites embedded in the amorphous silk region, and that they have cylindrical symmetry along the fiber axis, the Small Angle X-ray Scattering (SAXS) intensity in the equatorial direction can be given as [89] 

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Subsequently, an equation was provided7 to describe the unidimensional intercrystallite distance on the carbon support surface viz. 

Owing to the interference of the neighboring crystallites which limits the availability of oxygen, then C =/= CM but is modified by the intercrystallite distance, as well as the electrode potential. Thence the maximum diffusion radius (r + dr)IIBK= X/2 where X is defined above. In this case... 

Figure 4. Schematic of the development ofthe diffusion layer as a function of current density and intercrystallite distance for the supported electrocatalyst particles.

In order to see the composition of secondary X-ray radiation. X-ray diffraction analyzers are used (refer to Section 6.3.5) an analyzing crystal with a known structure and, hence, with known crystal interplanar distance enables the measuring of the reflecting angle and then the wavelength of the secondary radiation. By consulting tables of the characteristic X-rays, one can find the sample chemical composition in every point, in crystallites and intercrystallite junctions, and in amorphous samples, etc. 

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