lect15_reel5_2pg

lect15_reel5_2pg - Crystal Structures X-ray Diffraction...

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1 Crystal Structures & X -ray ray Diffraction Diffraction Chemistry 123 Spring 2008 Dr. Woodward Crystals Crystals
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2 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 3D Crystal 3D Crystal Systems (7) Systems (7) Cubic Cubic Tetragonal Tetragonal Hexagonal Rhombohedral Rhombohedral Orthorhombic Orthorhombic Monoclinic Monoclinic Triclinic Triclinic 14 14 Bravais Bravais Lattices Lattices Cubic The crystal systems each have distinctive symmetry and unit cell dimensions
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X-ray Diffraction ray Diffraction Diffraction Demo Diffraction Demo Take home message • The diffraction pattern is related but not equal to the grid pattern • Diffraction is most effective for monochromatic light
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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_2pg - Crystal Structures X-ray Diffraction...

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