1. 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 X
4 Lectures x 1.5 hr./lecture = 6 hr.

2. 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

3. Types of Solid and Order
Lecture 1/4
Types of Solid and Order
Single Crystal
Polycrystals/Polycrystalline
Grain Boundaries/Interphase Boundaries
Amorphous Solid

4. Polycrystals/Polycrystalline
Grain Boundaries

5. Polycrystals/Polycrystalline
Interphase Boundaries

6. Amorphous Materials

8. 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

9. P = primitive
F = face-centered
I = body-centered (interior)
A, B, C = base-centered
R = rhombohedral

10. 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

11. Fcc Cu

12. ZnS Structure

13. Solid C60 Structure

14. Miller Indices of Planes
Lecture 1/4
Miller Indices of Planes