# XRD¶

• XRD is the process by which reflected X-Rays interfere with each other when reflected off the different layers within a crystal
• The general rule is that $$n\lambda=2sin\theta$$, which relates the distance between the two layers reflecting the xrays to the wavelength of the xrays bombarding the crystal.

• XRD can be used to analyse both a single crystal and a crystalline powder.
• Since the orientation of the crystals can’t be aligned in a powder, the resulting diffraction pattern becomes a series of concentric circles.
• Single crystal spectra can be used to determine the absolute structure of a unit cell, and therefore the molecule
• Powder diffraction is used more as a profiling/fingerprinting technique