Abstract
AbstractThe cover illustration shows Professor Shechtmans lab notebook, wherein “10 fold ???” marks his discovery of quasicrystals (plate #1725) while examining rapidly quenched Al‐Mn alloys with TEM. The left‐hand page shows his sketch of part of the 10‐fold diffraction pattern, with labels of diffraction spots used for dark field TEM plates listed on the right. In addition, plates 1937–1939 mark micro‐diffraction patterns. Both types of experiments showed the absence of twins. Photos courtesy of the Ames Laboratory, which is operated by Iowa State University for the U.S. Department of Energy. Graphic art work was done by Mrs. Dina Mid of the Technion Printing Unit.magnified image
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