Changing under Pressure (IMAGE) University at Buffalo Caption These are illustrations of two compounds made from phosphorus atoms (orange) and hydrogen atoms (white). Such compounds are potential superconductors, and may form when phosphine is squeezed under extremely high pressures, according to University at Buffalo chemists who predicted the compounds' structures using XtalOpt, an open-source computer program created at UB. Credit Credit: Tyson Terpstra Usage Restrictions This image may only be used in conjunction with news stories discussing the research in the associated press release. 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.