Cement Crystal Simulation (IMAGE) Rice University Caption This is a close-up view of an edge dislocation defect in a cement crystal simulation by scientists at Rice University. They analyzed the crystalline structure of calcium silicates used in cement to maximize the ability to fine-tune the material. Credit Lei Tao/Multiscale Materials Laboratory Usage Restrictions For news reporting purposes only. 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.