报告题目：Synthesis of novel compounds with uniquecompositions and properties at high pressures
报 告 人：AlexanderGoncharov（GeophysicalLaboratory, Carnegie Institution of Washington, Washington, DC 20015, USA）
报告摘要：A major focus of the field of Chemistry is theprediction as to how various atoms form bonds, and how such bonding controlsthe structure and properties of matter. The majority of matter in the Universeresides at extreme pressures and temperatures (P-T) that force atoms intoextremely close contact, where very exotic compounds can become stable.Theoretical first principles calculations and laboratory experiments at extremeP-T conditions address this problem. I will present experiments at extremepressures up to 280 GPa that include recent discoveries of unusual “salts”(KCl3 and XeFe3), stable compounds with noble gasses (Na2He), polyhydrides ofNa, U, and S, and N-H polymers among others. These exotic materials hold apromise of potentially unparalleled physical and chemical properties such ashigh-temperature superconductivity, super-hardness, energy storage capacity,and others. Many of these newly discovered extreme materials are likely to bepresent in the interiors of the planets.