Figure (IMAGE) DOE/Brookhaven National Laboratory Caption This image shows (a) a Photograph of the purified promethium salt and (b) a graphic depicting the molecular structure of the promethium atom binding to the ligand, which consists of two amide carbonyl oxygen groups and one ether oxygen atom. Credit Oak Ridge National Laboratory/Nature Usage Restrictions For use with article and related content License Original 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.