XRD mills, or X-ray diffraction mills, are specialised laboratory instruments used for the preparation of samples for X-ray diffraction analysis. These mills are designed to produce finely powdered samples, which are essential for obtaining accurate and reproducible XRD patterns. The milling process enhances the homogeneity of the sample, facilitating better crystallinity and improved diffraction results. XRD mills often use ceramic or metal balls to grind materials, ensuring minimal contamination during the milling process. They are particularly useful in materials science, geology, and solid-state chemistry, where precise structural information is required. By enabling the preparation of high-quality samples, XRD mills play a crucial role in advancing research in crystallography and material characterisation.