Predicted Crystal Structures of Ca-C Compounds (IMAGE) Moscow Institute of Physics and Technology Caption These are predicted crystal structures of Ca-C compounds. Credit © Yan-Ling Li et al. / <I>Nature Communications</I> Usage Restrictions with copyright 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.