Determination of crystallite size of a polycrystalline sample using X-ray diffraction
The following steps are generally used for the estimation of crystallite size
- Peak identification: from the XRD plot (I Vs 2θ), diffraction peaks are identified and corresponding 2θ values are noted.
Calculation of FWHM: Full-width half maxima of the selected peaks is determined by measuring the width of the peak at half of its maximum intensity
Application of Scherrer equation: Using the following equation, crystallite size is obtained by averaging the values of multiple peaks.
D=Kλ/βCosθ