Infrared absorption of solid nitrogen at high pressures

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.8962· OSTI ID:383835

McCluskey, M D; Hsu, L; Wang, L; Haller, E E ^[1]

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1. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We have observed infrared absorption peaks in solid nitrogen at hydrostatic pressures as high as 7 GPa at liquid-helium temperatures. The shift in the AlSb:{sup 12}C{sub Sb} local vibrational mode is used to precisely calibrate the pressure. For all measured pressures we also observe the {nu}{sub 3} vibrational mode of CO{sub 2} impurities. For pressures greater than 1.9 GPa, a peak appears which we attribute to a N-N stretch mode of nitrogen in the {var_epsilon} phase. The single peak is consistent with previous x-ray and Raman studies which suggest that {var_epsilon}-N{sub 2} has a structure which belongs to the rhombohedral space group {ital R}{bar 3}{ital C}. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 383835
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
INFRARED SPECTRA
NITROGEN
SOLID STATE PHYSICS
SPACE GROUPS
TEMPERATURE RANGE 0000-0013 K
VERY HIGH PRESSURE
VIBRATIONAL STATES