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Synthesis of Non-molecular Nitrogen Phases at Mbar Pressures by Direct Laser-heating [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2007.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-file: 19 pages; size: 3.2 Mbytes
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Direct laser heating of molecular N2 to above 1400 K at 120-130 GPa results in the formation of a reddish amorphous phase and a transparent crystalline solid above 2000 K. Raman and x-ray data confirm that the transparent phase is cubic-gauche nitrogen (cg-N), while the reddish color of the amorphous phase might indicate the presence of N=N dish bonds. The quenched amorphous phase is stable down to at least 70GPa, analogous to cg-N, and could be a new non-molecular phase or an extension of the already known η-phase. A chemo-physical phase diagram is presented which emphasizes the difference between pressure- and temperature-induced transitions from molecular to non-molecular solids, as found in other low Z systems.
Report Numbers
E 1.99:ucrl-jrnl-229589
ucrl-jrnl-229589
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Note
Published through SciTech Connect.
03/26/2007.
"ucrl-jrnl-229589"
Physical Review B, vol. 76, no. 1, July 19, 2007, pp. 014113 76 1 ISSN 0163-1829; PRBMDO FT
Evans, W J; Yoo, C; Cynn, H; Iota, V; Klepeis, J P; Lipp, M J; Baer, B J.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14061707