Welcome to the
International Union of Crystallography

The IUCr is an International Scientific Union. Its objectives are to promote international cooperation in crystallography and to contribute to all aspects of crystallography, to promote international publication of crystallographic research, to facilitate standardization of methods, units, nomenclatures and symbols, and to form a focus for the relations of crystallography to other sciences. Read more »


  • André Authier (1932–2023)

    We mourn the loss of former IUCr President André Authier, Professor Emeritus at Pierre and Marie Curie (now Sorbonne) University, Paris, France, who died recently at the age of 90. Professor Authier served the IUCr for 45 years (since 1969) as Chair of various Commissions, on the IUCr Executive Committee [1984–1996 (President 1990–1993)], as Section Editor of Acta Cryst. A (1993–2011) and as Editor of International Tables Volume D: Physical properties of crystals. Read more here.

  • Wayne A. Hendrickson wins 13th Ewald Prize

    We send hearty congratulations to Wayne A. Hendrickson (Columbia University, NY, USA), winner of the 13th Ewald Prize for his exceptional contribution to structural biology including the development of MAD/SAD methods and crystallographic theory. Professor Hendrickson will deliver the Ewald Prize Lecture during the Opening Ceremony of the 26th IUCr Congress on 22 August 2023. Read more here

  • Registration for 2023 IUCr Crystallographic Computing School now open

    The 2023 Crystallographic Computing School is a satellite to the 26th IUCr Congress in Melbourne, and will be held at the Australian Synchrotron from 19 to 22 August. The school is intended for all programmers and method developers in all areas of crystallography (macromolecular, chemical, materials etc.). See here for more information.

  • Jian-Min Zuo wins 2023 Gjønnes Medal

    We are delighted to announce that Jian-Min Zuo (University of Illinois at Urbana-Champaign, USA) is the recipient of the 2023 Gjønnes Medal for his outstanding contributions to the development and application of quantitative electron diffraction. Professor Zuo will present a Keynote Lecture at the 26th IUCr Congress in Melbourne in August 2023. Read more here.

The best in crystallographic research

Uniquely among International Scientific Unions, the IUCr publishes its own primary research journals. Acta Crystallographica Sections A–F, IUCrJ, Journal of Applied CrystallographyJournal of Synchrotron Radiation and IUCrData communicate the highest quality peer-reviewed research findings across the many scientific areas to which crystallography is relevant.

[Melbourne 2023 logo]

26th IUCr Congress

Melbourne, Australia
22-29 August 2023

Regional Associate meetings
Baltimore, MD, USA
7-12 July 2023

(tentative schedule)
[AsCA logo]
Jeju, Republic of Korea
30 Oct-2 Nov 2022

[ECA logo]
Padova, Italy
26-31 August 2024

San José, Costa Rica
28-30 Nov 2022

IUCr Corporate Associates

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