Space Groups: A primer on topics significant for powder diffraction

Presentation Goal

  • Introduce symmetry concepts important for Rietveld analysis, particularly of inorganic materials. Knowledge of symmetry operations and space groups, as covered in any crystallography textbook, is assumed.
  • Format: PDF slides or a RealPlayer video of the slides with accompanying audio

Presentation Outline

  1. Space group naming
  2. Nomenclature
  3. Common tripping hazards
    • Rhombohedral vs. hexagonal settings
    • Origin 1 vs. Origin 2
    • Inputting space groups to GSAS
  4. Phase transformations
    • Terminology & relation to symmetry
    • Subgroups & Supergroups
    • Systematic absences