X-ray Diffraction Main Reference Lecture 1/4 X-ray Diffraction Main Reference X-ray Diffraction: A Practical Approach, C. Suryanarayana and M. Grant Norton, Plenum Press, New York and London, 1998, ISBN 0-306- 45744-X 4 Lectures x 1.5 hr./lecture = 6 hr.
Lecture 1/4 Class Experiment Diffraction of light through screening mesh and curtain mesh Source of rays: a light bulb Specimens: Screening meshes with at least two different mesh sizes Curtain mesh – curtain cut as about 3”x4” rectangles Observations: Look at the light bulb through screen meshes with different mesh sizes Look at the light bulb through piece of curtain mesh, pull the curtain mesh during observation Discussion Effects of mesh spacing on diffraction pattern Effects of different color (wavelength) of light (red, green, etc.) on diffraction pattern
Types of Solid and Order Lecture 1/4 Types of Solid and Order Single Crystal Polycrystals/Polycrystalline Grain Boundaries/Interphase Boundaries Amorphous Solid
Polycrystals/Polycrystalline Grain Boundaries
Polycrystals/Polycrystalline Interphase Boundaries
Amorphous Materials https://en.wikipedia.org/wiki/Glass
https://www.reade.com/products/amorphous-metals
Bravais Lattices 7 Crystal Systems 14 Bravais Lattices Lecture 1/4 Bravais Lattices 7 Crystal Systems Triclinic, Monoclinic, Orthorhombic, Tetragonal, Hexagonal, Rhombohedral/Trigonal, Cubic 14 Bravais Lattices
P = primitive F = face-centered I = body-centered (interior) A, B, C = base-centered R = rhombohedral
Crystal Structures Bravais Lattice + Basis -> Crystal Structures Lecture 1/4 Crystal Structures Bravais Lattice + Basis -> Crystal Structures One atom per lattice point cubic F lattice + one atom = face-centered cubic (fcc) structure Cu, Au, Ni, Ag Two atoms per lattice point cubic F lattice + two atoms = Zinc blende structure More than two atoms per lattice point Cubic zirconium oxide (ZrO2) Solid C60
Fcc Cu
ZnS Structure https://www.quora.com/What-is-the-structure-diagram-of-a-zinc-blende
Solid C60 Structure http://www.chemtube3d.com/solidstate/SS-C60K.htm
Miller Indices of Planes Lecture 1/4 Miller Indices of Planes