- AK Young Crystallographers (AK21)
- AK1 Biological structures
- AK2 High Pressure Crystallography
- AK3 Electron Microscopy
- AK4 Non-crystalline, partial crystalline and nanocrystalline structures
- AK5 Crystal Physics
- AK6 Molecular compounds
- AK7 Neutron scattering
- AK9 Theoretical Crystallography
- AK10 Microscopy
- AK11 High-resolution X-ray scattering and synchrotron radiation
- AK12 Spectroscopy
- AK13 Powder diffraction
- AK14 Computational Crystallography
- AK15 Mineralogical and Technical Crystallography
- AK16 Aperiodic Crystals
- AK17 Crystallography in Teaching
- AK18 Interfaces
- AK19 Crystal Chemistry
- AK20 Crystallography in Materials Science