Geochemistry, High Pressure, Matter at Extreme States

Michael Walter is the Director of the Geophysical Laboratory. Walter’s research focuses on the differentiation of the mantle and core, mantle melting and element partitioning, subsolidus phase relations and crystal chemistry, and the origin of deep mantle diamonds and their inclusions.

Geochemistry, High Pressure

The Geophysical Laboratory's weekly seminar series continues with Jiachao Liu of the University of Texas at Austin. He will present, "How does oxidized mantle behave differently from normal mantle in geophysical and geochemical perspectives?"

High Pressure, Materials, Matter at Extreme States

The Geophysical Laboratory’s Tim Strobel and Venkata Bhadram now report unexpected quantum behavior of hydrogen molecules, H2, trapped within tiny cages made of organic molecules, demonstrating that the structure of the cage influences the behavior of the molecule imprisoned inside it.

High Pressure, Materials, Matter at Extreme States

New work from the Geophysical Laboratory's high-pressure geophysicists Chuanlong Lin, Jesse Smith, Stanislav Sinogeikin, and Guoyin Shen found evidence of the long-theorized, difficult-to-see low-density liquid phase of water.

High Pressure

Using submicron synchrotron x-ray beam, a group of scientists led by the Geophysical Laboratory's Ho-kwang “Dave” Mao, have studied the loading behavior of the DAC up to 400 GPa. In situ high-pressure synchrotron X-ray diffraction and absorption experiments have been done to investigate the behavior of the DAC. This study provides a detailed picture of pressure loading and distribution, gasket thickness variation, and diamond anvil deformation up to 400 GPa.

High Pressure, Matter at Extreme States, Planetary Science

Washington, DC — Plumes of hot rock surging upward from the Earth’s mantle at volcanic hotspots contain evidence that the Earth’s formative years may have been even more chaotic than previously thought, according to new work from the Geophysical Laboratory's Yingwei Fei and Colin Jackson published in Nature.

High Pressure, Materials, Matter at Extreme States

A team of experimental and computational scientists led by the Geophysical Laboratory’s Tim Strobel and Venkata Bhadram have synthesized a long sought-after form of titanium nitride, Ti3N4, which has promising mechanical and optoelectronic properties.

High Pressure

The Geophysical Laboratory's weekly seminar series continues with Heidi Höfer of the Goethe University Frankfurt. She will present, "The oxidation state of iron determined by electron microprobe: the flank method and its application to high-pressure experiments and mantle samples."

High Pressure, Materials, Matter at Extreme States

Wan Si Tang is a postdoctoral associate at the Geophysical Laboratory. She is working with Tim Strobel on research to synthesize metastable materials using molecular precursor-based pathways.

High Pressure, Materials, Matter at Extreme States

The Geophysical Laboratory's weekly seminar series continues with Ross Hrubiak, who comes from our HPCAT location. He will present, "Experimental evidence of a body centered cubic iron at the Earth’s core condition."

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