Before revision: 300px|upright=1.4|A powder X-ray diffractometer in motion X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions.
After revision: 300px|upright=1.4|A powder X-ray diffractometer in motion X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract inof specific directions.