International Program Committee Members Prof Brendan KennedyCo-Chair, Australia Dr Olga AlekseevaIUCr Representative, Russia Dr Natalia AlvarezGender, Equity and Diversity Representative, Uruguay Prof Giuliana AquilantiCommission on X-ray Absorption and Fine Structure, Italy Prof Miguel A G ArandaSynchrotron and Free Electron Lasers, Spain Prof Max AvdeevCommission on Magnetic Structures, Australia Prof Geetha BalakrishnanCommission on Crystal Growth and Characterization of Materials, United Kingdom A/Prof Laure BourgeoisCommission on Electron Crystallography, Australia Prof Malla Reddy ChillaCommission on Structural Chemistry, India A/Prof John DanielsCommission on Diffraction Microstructure Imaging, Australia A/Prof Louise DaweIUCr-2026 Representative, Canada Dr Andrea DessenCommission on Biological Macromolecules, Brazil & France Prof Graciela Diaz de DelgadoIUCr Executive Committee Representative, Venezuela Prof Paulina DominiakCommission on Quantum Crystallography, Poland Dr Kamil Filip DziubekCommission on High Pressure and the Committee on Data, Italy Prof Marcia C A FantiniCommission on X-ray Absorption and Fine Structure, Brazil Prof Santiago Garcia-GrandaIUCr Executive Committee Representative, Spain Dr Saulius GrazulisCommittee for CIF, Lithuania Dr Annalisa GuerriCommission on Crystallographic Teaching, Italy Prof Delia HaynesCommission on Structural Chemistry, South Africa Prof Koen JanssensCommission of Crystallography in Art and Cultural Heritage, Belgium Prof Yaroslav KhimyakCommission on Nuclear Magnetic Resonance Crystallography and Related Methods, United Kingdom Prof Radomir KuzelIUCr-2025 Representative, Czech Republic Prof Christian LehmannCommission on Structural Chemistry, Germany Prof Chris LingCommission on Inorganic and Mineral Structures, Australia Prof Atushi NakagawaCommission on Biological Macromolecules, Japan Prof Antonia NeelsCommission on Powder Diffraction, Switzerland Prof Tomoji OzekiCommission on Structural Chemistry, Japan Prof Shilie PanCommission on Crystallography of Materials Dr Santosh PanjikarCommission on Crystallographic Computing, Australia Prof Vanessa PetersonCommission on Neutron Scattering, Australia Prof Wei RenCommission on Mathematical and Theoretical Crystallography, China Prof Amy SarjeantIUCr-2026 Representative, USA Prof Siegbert (Siggi) SchmidCommission on Aperiodic Crystals, Australia Prof Xiao-DongCommission on Biological Macromolecules, China Prof Dina TomchickCommission on Biological Macromolecules, USA Prof Angus WilkinsonCommission on Powder Diffraction, USA Dr Kathleen (Katy) WoodCommission on Small Angle Scattering, Australia Dr Nadia ZatsepinCommission on Synchrotron and Free Electron Lasers, Australia Prof Michele ZemaIUCr Outreach Representative, Italy Key Dates Call to action Date Notification of abstract acceptance Late March 2023 President’s Fund applications close 18 March 2023 Early bird registration Close 31 March 2023 Retiree Registration Rates 31 March 2023 Poster Abstracts Close 31 May 2023 Standard Registration deadline 23 June 2023 Accommodation booking deadline 22 July 2023 IUCr 2023 pre-Congress workshops 21 & 22 August 2023 IUCr 2023 Congress 23-29 August 2023