Welcome to the new 2023 council members, committee members and SIG Officers

It was election time again and there are some changes to the ACA council.  We would like to thank those who are now leaving the ACA Council including David Rose (as Immediate Past President) and Gerald Audette (as the Canadian Representative to Council).  We truly appreciate their commitment to the association and their inspiring work as leaders of the organization.  We are also delighted to welcome two new council members, Allen Oliver as ACA Vice President 2023 and Sara Andres as Canadian Representative to Council.

ACA Leadership
Standing Committees
Scientific Interest Group Officers

The 2023 ACA Summer Course

The ACA Summer Course in Chemical Crystallography, held each summer (in even years now at Purdue University, and in odd years at Northwestern University) is a program that is in its third decade of instruction in the United States. The current incarnation of the course is directed towards Single-Crystal Chemical Crystallography and Powder Diffraction techniques, as applicable to small molecule studies. The course is designed to instruct attendees in the theory and practice of these two aspects of crystallography.  Find out more...https://acasummercourse.net/


Crystallography and structural science have been and continue to be on the forefront of major discoveries in the life sciences, medicinal chemistry, and materials science. The American Crystallographic Association, Inc. (ACA) is the home for over 1,000 structural scientists all over the world who are united by the common purpose to “promote interactions among scientists who study the structure of matter at atomic (or near atomic) resolution”.

Membership in the ACA is open to any person who is actively interested in the purposes of the Association. The ACA welcomes everyone from students to retirees. All of our members contribute to the life and vigor of the Association.  Read about all of the benefits that an ACA membership can bring to you...

RefleXions: Fall 2022 Edition

The Fall issue of RefleXions is now available... 

  • Cora Lind-Kovacs: Medal Winner!
  • The End of an Era at NIST
  • History Project Update


Education & Outreach

Crystal growing competitions are wonderful events that get kids excited about science.  We are proud to support a number of crystal growing competitions around the US.  Find out more...

(pictured above: STARS Teammates from the Cobb County Crystal Growing Competition)