High Pressure, Materials

A research team from the Geophysical Laboratory, including Oleksandr Kurakevych, Timothy Strobel, Duck Young Kim and George Cody, has reported the synthesis of an ionic semiconductor, Mg2C, under high-pressure, high-temperature conditions, which is fully recoverable to ambient conditions.

High Pressure

Washington, DC—The key to understanding Earth’s evolution is to look at how heat is conducted in the deep lower mantle—a region some 400 to 1,800 miles (660 to 2,900 kilometers) below the surface.

High Pressure, Materials

Washington, DC— Hydrogen is deceptively simple. It has only a single electron per atom, but it powers the sun and forms the majority of the observed universe. As such, it is naturally exposed to the entire range of pressures and temperatures available in the whole cosmos.

High Pressure, Materials

Washington, DC—Superconductivity is a rare physical state in which matter is able to conduct electricity—maintain a flow of electrons—without any resistance. This phenomenon can only be found in certain materials under specific low-temperature and high-pressure conditions.

High Pressure, Materials

Washington, DC, 19 June 2013--Using novel high-pressure x-ray techniques, Geophysical Laboratory scientists Li ZhangYue Meng (HPCAT), Wenge Yang (HPSync), and Ho-kwang Mao, along with CDAC Partner Wendy Mao (Stanford) and colleagues from the University of Chicago have obtained the very first single-crystal structure of (Mg,Fe)SiO3 postperovskite phase under high pressure corresponding to the condition in the Earth’s D′′ layer.

High Pressure

Washington, DC—Using revolutionary new techniques, a team led by Carnegie’s Malcolm Guthrie has made a striking discovery about how ice behaves under pressure, changing ideas that date back almost 50 years.

High Pressure, Materials

Washington, DC—Hydrogen is the most abundant element in the universe. The way it responds under extreme pressures and temperatures is crucial to our understanding of matter and the nature of hydrogen-rich planets.

 

High Pressure

Washington, DC— A team of researchers has made a major breakthrough in measuring the structure of nanomaterials under extremely high pressures.

High Pressure, Materials

Washington, DC, 21 December 2012 — Researchers from the Geophysical Laboratory have observed a new compound form of sodium and silicon - a "covalent metal," with unusual structural and electrical properties.

High Pressure

Washington, DC — When materials are stressed, they eventually change shape. Initially these changes are elastic, and reverse when the stress is relieved. When the material’s strength is exceeded, the changes become permanent.

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