4. - FOUR-CIRCLE REFERENCE

4.1. - Introduction
4.2. - Diffractometer Alignment
4.3. - Orientation Matrix
4.4. - Four-Circle Modes
4.5. - Freezing Angles
4.6. - Sectors
4.7. - Cut Points
4.8. - Four-Circle Files
4.9. - Four-Circle Variables
4.10. - Four-Circle Functions
4.11. - Four-Circle Macros
4.12. - Zone Macros
4.13. - Least-Squares Refinement of Lattice Parameters