The European Crystallographic Association (ECA) is a scientific association having as objectives the advancement of crystallography in all its aspects and to promote cooperation in crystallography between the countries of Europe, Africa and the Middle East. ECA is one of the three regional affiliates of IUCr. Our sister affiliates are the American (ACA) and the Asian (AsCA) Crystallographic Associations. The ECA Membership may be Individual (IM), Corporate Affiliate (CAM) or National (NM). Crystallographic Organisations from countries of the ECA geographic area can affiliate as ECA National Members.

The activity of different scientific fields is organised and coordinated by groups of researchers of NMs and IMs called Special Interest Groups (SGIs). Cross-disciplinary and networking interests are handled by General Interest Groups (GIGs).

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