Atomic Fractal Percolation Structure (IMAGE) California Institute of Technology Caption Atomic clusters of icosahedra in Cu46Zr54 (Cu: blue, Zr: yellow). The clusters span, or percolate, the simulation box. Credit David Chen/Greer Laboratory/Caltech Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.