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X-Ray Crystallography

nλ = 2d sinθ (Bragg's law); 2θ scan; d-spacing from diffraction
Quick Reference
Formula / Notationnλ = 2d sinθ (Bragg's law); 2θ scan; d-spacing from diffraction
Also Known AsX-ray diffraction (protein structure), XRC, single-crystal X-ray analysis

What is X-Ray Crystallography?

A technique for determining the atomic structure of crystalline materials by analyzing X-ray diffraction patterns. When X-rays interact with the crystal lattice, they diffract at specific angles described by Bragg's law. Used to determine the structures of proteins, DNA, and inorganic materials.

Formula & Notation

nλ = 2d sinθ (Bragg's law); 2θ scan; d-spacing from diffraction

Other Names / Synonyms: X-ray diffraction (protein structure), XRC, single-crystal X-ray analysis

Properties & Characteristics

X-ray crystallography is a technique for determining the three-dimensional atomic structure of crystalline materials by analysing the diffraction pattern of X-rays passing through the crystal. The diffraction pattern arises from the regular arrangement of atoms in the crystal lattice. Software analyses intensity patterns to reconstruct electron density maps and determine atomic positions. It provides the most accurate bond lengths and angles.

Uses & Applications

X-ray crystallography has determined the structures of thousands of proteins, nucleic acids, and small molecules, transforming biology and drug design. It confirmed the double helix structure of DNA. Pharmaceutical companies use crystal structures to design drugs that fit enzyme active sites precisely.

Safety Information

X-ray crystallography uses ionising X-radiation requiring appropriate shielding of the instrument. Many protein crystals require cryogenic conditions using liquid nitrogen, which is an asphyxiation hazard in confined spaces.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term X-Ray Crystallography
Formula nλ = 2d sinθ (Bragg's law); 2θ scan; d-spacing from diffraction
Synonyms X-ray diffraction (protein structure), XRC, single-crystal X-ray analysis

Frequently Asked Questions

A technique for determining the atomic structure of crystalline materials by analyzing X-ray diffraction patterns. When X-rays interact with the crystal lattice, they diffract at specific angles described by Bragg's law. Used to determine the structures of proteins, DNA, and inorganic materials.

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