Copper-Aluminum Superatom (2 of 2) (IMAGE) Technical University of Munich (TUM) Caption From the outside, the cluster made of 55 copper and aluminum atoms looks like a crystal, but chemically it has the properties of an atom. The heterometallic superatom created at Chair of Inorganic and Organometallic Chemistry at the Technical University of Munich is the largest ever produced in the laboratory. Credit Christian Gemel / TUM Usage Restrictions None 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.