Your Voice Matters — Stand with the AUC

Our community is at a turning point. On January 1, 2026, the National Academy of Sciences (NAS) will step down as the U.S. adhering body to the International Union of Crystallography (IUCr), bringing an end to the U.S. National Committee for Crystallography (USNC/Cr). To keep the United States represented on the global stage, the newly formed American Union of Crystallography (AUC) is stepping forward as an independent, transparent non-profit dedicated to advancing research, education, outreach, and the responsible stewardship of vital legacy funds. Stand with the AUC—sign the petition today (membership in the ACA is not required) and help secure the future of U.S. structural science.

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Stay connected with the latest news, ideas, and stories from the American Crystallographic Association. The ACA Blog highlights community achievements, shares insights from leaders in the field, features engaging puzzles, and offers updates on upcoming meetings and initiatives. The latest posts include the Summer edition of the President’s Column, offering reflections and updates from ACA leadership. It’s your hub for celebrating the people, science, and events shaping the future of crystallography.

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ACA2025

Thank you to everyone who joined us for the ACA 2025 Annual Meeting in Lombard! We are incredibly grateful for your participation, enthusiasm, and contributions throughout the week—from the engaging workshops and scientific sessions to the lively mixers and special events. Your presence helped make this year’s meeting a true celebration of our community and our shared commitment to advancing crystallographic science. Whether you presented, volunteered, sponsored, exhibited, or simply attended, your involvement was essential to the success of ACA 2025. We look forward to continuing this momentum as we head toward IUCr 2026 in Calgary—thank you again for being part of such a memorable event!