Structures of the Metal Ion-Ligand Dimers (image) American Institute of Physics Share Print E-Mail Caption These are structures of the metal ion-ligand dimers. White, cyan, blue, red, pink and green spheres are H, C, N, O, Mg and Ca atoms. Credit Zhifeng Jing, Rui Qi, Chengwen Liu and Pengyu Ren Usage Restrictions This image may be used only with appropriate credit. Share Print E-Mail 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.