Washington, D.C.— A Carnegie-led team was able to discover five new forms of silica under extreme pressures at room temperature. Their findings are published by Nature Communications. Silicon...
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Anat Shahar was awarded the Clarke Award of the Geochemical Society. It is awarded to an early-career scientist for " a single outstanding contribution to geochemistry or cosmochemistry,...
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Tuesday, December 16, 2014—New work from Carnegie's Ivan Naumov and Russell Hemley delves into the chemistry underlying some surprising recent observations about hydrogen, and reveals...
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December 12, 2014 Hydrogen is the most-abundant element in the cosmos. With only a single electron per atom, it is deceptively simple. As a result, hydrogen has been a testing ground for theories of...
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Washington, D.C.—Silicon is the second most-abundant element in the earth's crust. When purified, it takes on a diamond structure, which is essential to modern electronic devices—...
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Carbon plays an unparalleled role in our lives: as the element of life, as the basis of most of society’s energy, as the backbone of most new materials, and as the central focus in efforts to...
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Tiny cages hold big promise. Understanding the chemical reactions that can create tiny molecular cages that hold other “guest” molecules—structures called clathrates—is key to...
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Minerals Love Life It was not until recently that scientists even thought about how the mineral kingdom may have changed over time. Traditionally classified by composition, structure, and other...
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The Geophysical Laboratory has made important advances in the growth of diamond by chemical vapor deposition (CVD).  Methods have been developed to produce single-crystal diamond at low pressure having a broad range of properties.
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Scientists simulate the high pressures and temperatures of planetary interiors to measure their physical properties. Yingwei Fei studies the composition and structure of planetary interiors with high-pressure instrumentation including the multianvil apparatus, the piston cylinder, and the diamond...
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Alexander F. Goncharov's analyzes materials under extreme conditions such as high pressure and temperature using optical spectroscopy and other techniques to understand how matter fundamentally changes, the chemical processes occurring deep within planets, including Earth, and to understand and...
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Experimental petrologist Michael Walter became director of the Geophysical Laboratory beginning April 1, 2018. His recent research has focused on the period early in Earth’s history, shortly after the planet accreted from the cloud of gas and dust surrounding our young Sun, when the...
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Human industry and ingenuity has done more to diversify and distribute minerals on Earth than any development since the rise of oxygen over 2.2 billion years ago, Carnegie's Robert Hazen and team...
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Washington, DC— Superconductivity is a rare physical state in which matter is able to conduct electricity—maintain a flow of electrons—without any resistance. It can only be found in certain...
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Washington, D.C. — 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...
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Explore Carnegie Science

Artist's conception of lead selenide under pressure courtesy of Xiao-Jia Chen.
October 7, 2019

Washington, DC— Pressure improves the ability of materials to turn heat into electricity and could potentially be used to create clean generators, according to new work from a team that includes Carnegie’s Alexander Goncharov and Viktor Struzhkin published in Nature Materials.

Alternative energy sources are key to combating climate change caused by carbon emissions. Compounds with thermoelectric capabilities can convert thermal energy’s innate, physical need to spread from a hot place into a cold place into energy—harvesting electricity from the temperature differential. In theory, generators built from these materials could be used to recover electricity

Journal of Physical Chemistry Letters cover
September 9, 2019

Washington, DC— New materials can contribute potential solutions to many societal issues—from increasing access to clean drinking water to improving solar panel efficiency. But figuring out how to synthesize them can be a difficult process of trial and error.

Carnegie’s Li Zhu, Timothy Strobel, and Ronald Cohen have created a new tool for predicting pathways to novel materials that could speed this process up significantly. A paper demonstrating the method’s effectiveness is a cover story in The Journal of Physical Chemistry Letters.

Called PALLAS after one of the nicknames for Athena, the Greek goddess of wisdom, their method creates a kind of

March 13, 2019

Carolyn Beaumont, a senior at the Potomac School in McLean VA, won 5th place in the 78th Regeneron Science Talent Search. During the summer of 2018, she worked with Geophysical Laboratory staff members George Cody and Bjorn Mysen on a project to shed light on the molecular details of how water interacts with silicate melts. During her time, she learned how to run all aspects of the experiment, including how to operate a piston cylinder pressure apparatus that generates pressures on the order of 1.5 GPa and temperatures in excess of 1400°C. She also used molecular spectroscopy and nuclear magnetic resonance spectroscopy, to obtain detailed

September 20, 2018

A new Venture Grant has been awarded to the Geophysical Laboratory’s Dionysis Foustoukos and Sue Rhee of the Department of Plant Biology, with colleague Costantino Vetriani of Rutgers University for their project Deciphering Life Functions in Extreme Environments.

Carnegie Science Venture Grants ignore conventional boundaries and bring together cross-disciplinary researchers with fresh eyes to explore different questions. Each grant provides $100,000 support for two years with the hope for surprising outcomes. The grants are generously supported, in part, by trustee Michael Wilson and his wife Jane and by the Ambrose Monell Foundation.

Deep sea hydrothermal vents

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The Geophysical Laboratory has made important advances in the growth of diamond by chemical vapor deposition (CVD).  Methods have been developed to produce single-crystal diamond at low pressure having a broad range of properties.

Sally June Tracy applies cutting-edge experimental and analytical techniques to understand the fundamental physical behavior of materials at extreme conditions. She uses dynamic compression techniques with high-flux X-ray sources to probe the structural changes and phase transitions in materials at conditions that mimic impacts and the interiors of terrestrial and exoplanets. She is also an expert in nuclear resonant scattering and synchrotron X-ray diffraction. She uses these techniques to understand novel behavior at the electronic level.  Tracy received her Ph.D. from the California Institute of

Anat Shahar is pioneering a field that blends isotope geochemistry with high-pressure experiments to examine planetary cores and the Solar System’s formation, prior to planet formation, and how the planets formed and differentiated. Stable isotope geochemistry is the study of how physical and chemical processes can cause isotopes—atoms of an element with different numbers of neutrons-- to separate (called isotopic fractionation). Experimental petrology is a lab-based approach to increasing the pressure and temperature of materials to simulate conditions in the interior Earth or other planetary bodies.

Rocks and meteorites consist of isotopes that contain chemical

Experimental petrologist Michael Walter became director of the Geophysical Laboratory beginning April 1, 2018. His recent research has focused on the period early in Earth’s history, shortly after the planet accreted from the cloud of gas and dust surrounding our young Sun, when the mantle and the core first separated into distinct layers. Current topics of investigation also include the structure and properties of various compounds under the extreme pressures and temperatures found deep inside the planet, and information about the pressure, temperature, and chemical conditions of the mantle that can be gleaned from mineral impurities preserved inside diamonds.

Walter

Scientists simulate the high pressures and temperatures of planetary interiors to measure their physical properties. Yingwei Fei studies the composition and structure of planetary interiors with high-pressure instrumentation including the multianvil apparatus, the piston cylinder, and the diamond anvil cell. 

The Earth was formed through energetic and dynamic processes. Giant impacts, radioactive elements, and gravitational energy heated the  planet in its early stage, melting materials and paving the way for the silicate mantle and metallic core to separate.  As the planet cooled and solidified geochemical and geophysical “fingerprints” resulted from