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Today’s USND Business Meeting

The U.S. National Division (USND) of the ACA will hold a business meeting today at 2:00 PM ET  to discuss proposed bylaw amendments. All ACA members residing in the U.S. are automatically members of the USND, and we warmly invite you to attend.

The meeting will also include a presentation on the newly formed American Union of Crystallography (AUC) and its connection with the USND. Anyone interested in the USND transition and the proposed AUC is welcome—ACA membership is not required. Simply complete the registration form, and the join information will be provided to you on the confirmation page.

Agenda
Register to Attend
Sign the AUC Petition
AUC Information

Important for ACA Members: Our email system is currently experiencing issues. Please check your junk or spam folder for the updated join information being sent this morning. If you do not receive it, you can still access the meeting by completing the registration form.

Shape the Future of the ACA – Elections Coming This Fall

The 2025 ACA Elections will take place later this fall, and we encourage you to visit our election page to learn more about the process and open positions. We are especially seeking candidates to serve as Special Interest Group (SIG) officers—key roles that help shape programming, foster collaboration, and strengthen our community. If you’re interested in running, please visit the election page to view current openings and submit your expression of interest.

Submit Your Expression of Interest

 

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.

Read the Blog Post
 

Explore the ACA Blog

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.

Explore More Stories

 

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!