Powder X-Ray Diffraction (PXRD) was performed on a Rigaku MultiflexII Desktop X-ray Diffractometer (Cu Kα, 40 kV, 30 mA) instrument in the stepscan mode with diffraction angle (2θ) from 5 to 80°. The crystallite size was calculated from Debay-Shrerrer equation, using the full-width at half-maximum (FWHM) value of the (003) reflection.