American Crystallographic Association

10/12/2026

Today we honor Indigenous Peoples' Day and the Indigenous communities whose knowledge of the land, its minerals and its materials long predates modern science.

We're committed to a crystallography community where Indigenous scientists belong and lead.

To our Canadian members celebrating Thanksgiving today, we're grateful for you too.

10/06/2026

A crystal-clear congratulations from the ACA! ❄️🔬 Francis Halzen’s 2026 Nobel Prize in celebrates work that turned Antarctic ice into a window on the universe. IceCube detects elusive neutrinos, helping scientists explore some of the cosmos’s most powerful events.

The Nobel Prize in Physics 2026 was awarded to Francis Halzen “for decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin.”

09/02/2026

The ACA joins the international scientific community in mourning the passing of Professor Ada Yonath, Nobel laureate and pioneering structural biologist.

Her groundbreaking research revealed the structure of the ribosome, advanced our understanding of antibiotics, and demonstrated what can be achieved through curiosity, courage, and perseverance.

We honor her extraordinary life and enduring contributions to and .

Read our tribute:

The American Crystallographic Association joins the international scientific community in mourning the passing of Professor Ada Yonath, Nobel laureate and pioneering structural biologist, who died on August 31, 2026, at the age of 87.

07/14/2026

Yesterday, the American Crystallographic Association submitted formal comments to the U.S. Office of Management and Budget on proposed changes to the federal regulations that govern research funding.

Advocating for policies that support scientific research is an important part of our mission. Learn why we submitted these comments—and why engagement in the public comment process matters.

Read more: https://bit.ly/4wGrwVU

07/13/2026

Reminder: The public comment period on the proposed OMB Uniform Guidance revisions closes tonight at 11:59 PM ET.

The American Crystallographic Association is partnering with American Physical Society and many other scientific societies to support an easy-to-use public comment portal. If you haven't submitted your comments yet, there's still time.

Make your voice heard before the deadline: https://www.aps.org/initiatives/advocate-amplify/policy/federal-grants-rule-change

07/10/2026

📢 American Crystallographic Association Joins National Scientific Advocacy Effort

The ACA is proud to partner with the American Physical Society, along with dozens of other scientific societies and organizations, to encourage the research community to submit comments on the proposed OMB revisions to the Uniform Guidance (2 CFR Part 200).

Your voice matters. Help ensure the community is represented by submitting your comments through the APS advocacy portal.

Learn more and take action:

Make your voice heard on the Office of Management and Budget's proposed federal grant funding changes and defend the scientific community from this existential threat. Submit your comments by July 13, 2026, 11:59 p.m. ET (10:59 p.m. CT/9:59 p.m. MT/8:59 p.m. PT).

07/03/2026

The American Crystallographic Association is saddened by the passing of longtime ACA member Dr. Ian David Brown, known to his friends and colleagues as David.

A pioneer of the bond valence model, David's contributions transformed crystallography and continue to inspire scientists around the world.

Our heartfelt condolences go out to his family, friends, students, and colleagues. Read more about David's remarkable life and legacy on the ACA website:

It is with great sadness that the ACA shares the passing of longtime ACA member Dr. Ian David Brown, who died peacefully on June 29, 2026, at the age of 94. Known simply as David to his friends and colleagues, he leaves behind an extraordinary legacy that has shaped the field of crystallography for....

06/29/2026

⏰ IUCr2026 deadlines are approaching!

📅 July 1: Registration rates increase
🏨 July 6: Official hotel & residence hall room blocks close (or sooner if full)

Register and book your stay today: www.iucr2026.org

06/25/2026

🏠 Still need accommodations for ?

Limited availability remains University of Calgary in Kananaskis Hall (from CAD $68/night) and Yamnuska Hall 2-Bedroom Suites (from CAD $98/night).

Book your stay soon while rooms are still available—we look forward to welcoming you to : https://event.fourwaves.com/iucr-2026/pages/f32fdea2-a79c-416d-95e8-c0d79f9987ee

05/05/2026

⏰ Today’s the Day!

Early registration ends today—don’t miss your chance to secure the discounted rate IUCr2026. Join us and be part of an incredible program, engaging sessions, and a global community. Canadian National Committee for Crystallography International Union of Crystallography (IUCr)

Register now before it’s too late: www.iucr2026.org