lect15_reel5

lect15_reel5 - Crystal Structures & X-ray Diffraction...

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Crystal Structures & X-ray Crystal Structures & X-ray Diffraction Diffraction Chemistry 123 Spring 2008 Dr. Woodward
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Crystals Crystals
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Crystalline Solids Crystalline Solids Crystal Lattice  – A 3D array of points where each point  has an identical environment. Unit Cell  – The repeating unit (a unit cell is to a crystal, like  a “brick” is in a house).  In a given crystal all unit cells are  identical. CaF CaF 2 Unit Cell Unit Cell
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3D Crystal 3D Crystal Systems (7) Systems (7) Cubic Cubic Tetragonal Tetragonal Hexagonal Hexagonal Rhombohedral Rhombohedral Orthorhombic Orthorhombic Monoclinic Monoclinic Triclinic Triclinic 14 Bravais 14 Bravais Lattices Lattices Cubic The crystal systems each have distinctive symmetry and unit cell dimensions
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X-ray Diffraction X-ray Diffraction
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Diffraction Demo Diffraction Demo Take home message The diffraction pattern is related but not equal to the grid pattern Diffraction is most effective for
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This note was uploaded on 06/03/2011 for the course CHM 123 taught by Professor Woodward during the Spring '08 term at Ohio State.

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lect15_reel5 - Crystal Structures & X-ray Diffraction...

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