Join or Renew Today!

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”.

The annual ACA membership renewal period for 2022 is open and new members are always welcome to join! Annual dues allow us to share our scientific passions and accomplishments through different approaches, including the annual conference, publications and educational outreach.

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.

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...