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- Place a small amount of sample powder in the center of a quartz or single crystal quartz disk.
- Add 2–3 drops of 70 % isopropyl alcohol or distilled water to the sample. Note: Isopropyl dries faster than water.
- Spread the sample to a thin layer using a glass rod. The slurry should be spread evenly across the disk. If there is not enough material to cover the entire disk, concentrate the sample in the middle of the disk where the X-rays will contact the sample. You can also use a piece of tape, stick it to the sample holder and sprinkle the ground sample onto it.
- Place the sample in the desiccator to dry before running in the XRD.