DIAMOND 3 (IMAGE) Rice University Caption An electron microscope image shows a late stage in the evolution of carbon and fluorine atoms under flash Joule heating. The carbon atoms form concentric shells around a nanodiamond core. As heating proceeds, the diamond phase is replaced by the shell. Credit Tour Group/Rice University Usage Restrictions None 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.