CPA-4 Refractory Oxides 1 (IMAGE) DOE/Argonne National Laboratory Caption Illustration of the aerodynamic levitation process for studying refractory oxides at their melting points at the APS. A small bead of material is buoyed by gas and heated up by an overhead laser before X-rays examine its structure. Credit (Image by Ganesh Sivaraman/Argonne National Laboratory.) 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.