As a chemist, I cannot physically perform the X-ray diffraction experiment, but I can guide you through the process of determining the chemical composition of an unknown mineral sample using X-ray diffraction XRD technique.1. Prepare the sample: Grind the mineral sample into a fine powder and mount it on a glass slide or sample holder. Ensure that the sample is evenly distributed and has a flat surface.2. Set up the X-ray diffractometer: Turn on the X-ray source and adjust the settings according to the manufacturer's instructions. Make sure the X-ray detector is properly aligned and calibrated.3. Perform the XRD experiment: Place the sample in the X-ray beam path and start the data collection. The X-ray beam will interact with the sample, causing diffraction. The detector will measure the intensity of the diffracted X-rays at various angles 2 . This will generate a diffraction pattern, which is a plot of intensity vs. 2 angle.4. Analyze the diffraction pattern: The diffraction pattern contains peaks at specific 2 angles, which correspond to the d-spacing distance between atomic planes in the crystal structure of the mineral. Use Bragg's Law n = 2d sin to calculate the d-spacing values, where n is an integer, is the wavelength of the X-ray, and is the angle of diffraction.5. Identify the mineral phase s : Compare the d-spacing values and peak intensities obtained from your sample with those of known mineral phases in a database, such as the International Centre for Diffraction Data ICDD Powder Diffraction File PDF . The best match will give you the crystal structure and chemical composition of the mineral phase s present in your sample.6. Verify and refine the results: If necessary, perform additional experiments or analyses e.g., Rietveld refinement to confirm the identified mineral phase s and obtain more accurate information about the crystal structure and chemical composition.Once you have identified the mineral phase s and their crystal structures, you can determine the chemical composition of the unknown mineral sample.