Turnbull, DavidAziz, Michael2009-04-202000Turnbull, David and Michael J. Aziz. 2000. The tetrahedral motif in metal structures. In The Science of Alloys for the 21st Century: A Hume-Rothery Celebration, Proceedings of a Symposium Held During the Fall Meeting in St. Louis, MO, USA, October 18-20, 2000, ed. Patrice E. A. Turchi, Robert D. Shull, and Antonios Gonis, 179-182. Warrendale, Pennsylvania: TMS.http://nrs.harvard.edu/urn-3:HUL.InstRepos:2796949F.C. Frank's demonstration of the stability of the icosahedral configuration to either of the close packed ones in thirteen-atom clusters of mutually attracting hard spheres renewed interest in the occurence of tetrahedral configurations in metal alloy structures. This paper reviews some of these developments.en-US