Hong Zheng, Argonne National Laboratory (IMAGE) DOE/Argonne National Laboratory Caption Hong Zheng, principal materials engineer in Argonne's Materials Science Division, prepares for crystal growth in the high-pressure optical image zone furnace. The apparatus is one of few in the world that can create the extreme conditions needed to grow single crystals of the nickel oxide compound Pr4Ni3O8. Credit C. Suo 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.