Welcome to the History Portal of the American Crystallographic Association

LINK: Meet Structural Scientists LINK: ACA Beginnings LINK: Videos/Audios 
LINK: Nobel Prize Winners LINK: Impact of Structural Science LINK: Crystallography in the Americas

Click on Meet Structural Scientists to see the People List. Over 80 crystallographers and structural scientists are featured.

Latest Additions


Latest Additions

MegawHelen Megaw (1907-2002) was a British crystallographer who specialized in perovskite structures, ferroelectricity, and feldspars at the Cavendish laboratory. She, Bragg, Hodgkin, and Lonsdale created designs for the Festival of Britian in 1951. 

glazerA. Michael Glazer obtained his Ph.D. with Kathleen Lonsdale followed by a post-doc in Helen Megaw's   laboratory. He is well known for his research into       structure-property relationships in perovskites. 

LonsdaleHow do we know the benzene ring is flat? Because in 1929 Kathleen Lonsdale determined that the arrangement of the carbon atoms in hexamethylbenzene is hexagonal.  

DesirajuGautam Desiraju, past president of IUCr, contributed formative concepts in crystal engineering and investigated weak hydrogen bonds. In his memoir he illustrates how a work may be conceived and how it may be received—and how these two features may be largely unconnected.

stenkampIn Ronald Stenkamp's Living History he comments, "Making observations and asking questions is what I enjoy doing." He recalls small-molecule crystallography research at University of Oregon with Brian Matthews and graduate work in macromolecular crystallography with Lyle Jensen, Ed Lingafelter, and Verner Schomaker at the University of Washington. 

Michael RossmannThe Michael G. Rossmann Memorial Session was held at the ACA Annual Meeting in Covington, KY. Five speakers described their experience in Michael’s laboratory, beginning in 1972 with Jack Johnson, then Eddy Arnold, Hao Wu, Rui Zhao, and S. Saif Hassan – 47 years of ground-breaking research in macromolecular structure and development of new crystallographic methods for large structures


The ACA History Project showcases and preserves the history of crystallography, X-ray diffraction, and structural science through online access, articles in ACA RefleXions quarterly magazine, and videos to our YouTube channel.

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