Solid Nitrogen at Extreme Conditions of High Pressure and Temperature

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We review the phase diagram of nitrogen in a wide pressure and temperature range. Recent optical and x-ray diffraction studies at pressures up to 300 GPa and temperatures in excess of 1000 K have provided a wealth of information on the transformation of molecular nitrogen to a nonmolecular (polymeric) semiconducting and two new molecular phases. These newly found phases have very large stability (metastability) range. Moreover, two new molecular phases have considerably different orientational order from the previously known phases. In the iota phase (unlike most of other known molecular phases), N{sub 2} molecules are orientationally equivalent. The nitrogen molecules ... continued below

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PDF-file: 26 pages; size: 1.2 Mbytes

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Goncharov, A. & Gregoryanz, E. April 5, 2004.

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Description

We review the phase diagram of nitrogen in a wide pressure and temperature range. Recent optical and x-ray diffraction studies at pressures up to 300 GPa and temperatures in excess of 1000 K have provided a wealth of information on the transformation of molecular nitrogen to a nonmolecular (polymeric) semiconducting and two new molecular phases. These newly found phases have very large stability (metastability) range. Moreover, two new molecular phases have considerably different orientational order from the previously known phases. In the iota phase (unlike most of other known molecular phases), N{sub 2} molecules are orientationally equivalent. The nitrogen molecules in the theta phase might be associated into larger aggregates, which is in line with theoretical predictions on polyatomic nitrogen.

Physical Description

PDF-file: 26 pages; size: 1.2 Mbytes

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  • Chemistry at Extreme Conditions, Solid Nitrogen at Extreme Conditions of High Pressure and Temperature, Elsevier, Amsterdam, 2005, pp. 241-257

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  • Report No.: UCRL-BOOK-203536
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936471
  • Archival Resource Key: ark:/67531/metadc902343

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 5, 2004

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 7, 2016, 5:54 p.m.

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Goncharov, A. & Gregoryanz, E. Solid Nitrogen at Extreme Conditions of High Pressure and Temperature, book, April 5, 2004; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc902343/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.