CRYSTAL CHEMISTRY OF HYDROUS MINERALS

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Hydrogen has long been appreciated for its role in geological processes of the Earth's crust. However, its role in Earth's deep interior has been neglected in most geophysical thinking. Yet it is now believed that most of our planet's hydrogen may be locked up in high pressure phases of hydrous silicate minerals within the Earth's mantle. This rocky interior (approximately 7/8 of Earth's volume) is conjectured to contain 1-2 orders of magnitude more water than the more obvious oceans (the ''hydrosphere'') and atmosphere. This project is aimed at using the capability of neutron scattering from hydrogen to study the crystal ... continued below

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285 Kilobytes pages

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Zhao, Yusheng; von Dreele, Robert B.; Li, Wei & Shankland, Thomas J. February 2001.

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Hydrogen has long been appreciated for its role in geological processes of the Earth's crust. However, its role in Earth's deep interior has been neglected in most geophysical thinking. Yet it is now believed that most of our planet's hydrogen may be locked up in high pressure phases of hydrous silicate minerals within the Earth's mantle. This rocky interior (approximately 7/8 of Earth's volume) is conjectured to contain 1-2 orders of magnitude more water than the more obvious oceans (the ''hydrosphere'') and atmosphere. This project is aimed at using the capability of neutron scattering from hydrogen to study the crystal chemistry and stability of hydrogen-bearing minerals at high pressures and temperatures. At the most basic level this is a study of the atomic position and hydrogen bond itself. We have conducted experimental runs on hydrous minerals under high pressure and high temperature conditions. The crystallographic structure of hydrous minerals at extreme conditions and its structural stability, and hydrogen bond at high P-T conditions are the fundamental questions to be addressed. The behavior of the hydrous minerals in the deep interior of the Earth has been discussed.

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285 Kilobytes pages

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  • Report No.: LA-UR-01-888
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 774620
  • Archival Resource Key: ark:/67531/metadc720014

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  • February 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 29, 2016, 1:45 p.m.

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Zhao, Yusheng; von Dreele, Robert B.; Li, Wei & Shankland, Thomas J. CRYSTAL CHEMISTRY OF HYDROUS MINERALS, article, February 2001; New Mexico. (digital.library.unt.edu/ark:/67531/metadc720014/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.