Abstract
X-ray powder diffraction (XRPD) profiles provide valuable information on the geometrical shape of crystallites. This work delves into the complexity of determining the geometrical shape of crystallites, including plate-like and spherical TiO2 specimens, and discusses crucial parameters of edge length, shape coefficient, and orientation vector. The analysis demonstrates the necessity of using both line-broadening analysis and preferred orientation to elucidate the underlying physics of XRPD analysis. The choice of empirical formula is illustrated in analyzing plate-like crystallites with the characteristic of flat morphology. For spherical crystallites, the March-Dollase formula is recommended.
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