Vol. 7, Issue 1, Part A (2025)

X-ray Diffraction (XRD) is a powerful and widely used non-destructive analytical technique for characterizing the crystalline structure of materials. This article explores the fundamental principles of XRD, including Bragg's Law, which governs the relationship between diffraction angles and interplanar spacing. 
The methodology covers sample preparation, X-ray generation, diffraction process, and data analysis. The operating system of an XRD machine is described in detail, including key components such as the X-ray source, goniometer, sample holder, and detector. The article highlights the merits of XRD, such as its ability to provide accurate phase identification and crystallographic information, as well as its limitations, including challenges with amorphous materials and complex data interpretation. Real-world applications in pharmaceuticals, material science, geology, nanotechnology, and archaeology are presented, demonstrating XRD's versatility.