Methodology to Reconstruct Water Chemistry (image) Tokyo Institute of Technology Share Print E-Mail Caption One of the clay minerals, smectite, can trap ions in water through ion exchanges in the presence of water. Even after loss of water, smectite records ion compositions within interlayers of its structure. Credit Nature Communications Usage Restrictions The image may only be used with appropriate caption and 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.