| Term | Definition |
|---|---|
| Degree of crystallinity | |
| Lattice | |
| Orthogonal | perpendicular, at right angles, or 90° to each other |
| Period | distance between atoms in a lattice |
| Periodicity | |
| x-ray | Form of energy |
| x-ray diffraction | Method used to determine |
| Interference | |
| Diffraction | |
| Crystallography | The study of crystals |
| Faurier series | |
| Cubic | |
| Body Center Cubic (BCC) | |
| Face Center Cubic (FCC) | |
| Tetragonal | |
| Orthorhombic | |
| Rhombohedral | |
| Monoclinic | |
| Triclinic | |
| Plane | two-dimensional flat surface or direction |
| Amorphous | Lacking any distinct structure |
| Bragg equation | Equation used to determine plane positions using x-ray diffraction |