Fizika Nizkikh Temperatur: Volume 27, Number 9-10 (September 2001), p. 1170-1174    ( to contents , go back )

Vibrational dynamics of solid molecular nitrogen to megabar pressures

A. F. Goncharov, E. Gregoryanz, H.-K. Mao, and R. J. Hemley

Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington 5251 Broad Branch Road, N. W., Washington, D. C. 20015
pos Анотація:

Received July 2, 2001


We report the results of Raman and synchrotron infrared absorption measurements of several molecular phases of solid nitrogen to pressures above 100 GPa (300 K). Low-temperature vibrational spectra to 45 GPa are also presented. The changes in Raman and infrared spectra at 60 GPa and 300 K are interpreted as arising from the e z transition reported at low temperature. The character of splitting of the Raman vibron n2 observed at 25 GPa and low temperatures differs from that previously reported, a difference that we ascribe to different experimental procedures employed and metastability of the low-temperature phase.

62.50.+p - High-pressure and shock wave effects in solids and liquids (for high pressure apparatus and techniques, see 07.35.+k; for shock wave initiated high-pressure chemistry, see 82.40.Fp; for high-pressure behavior of rocks and minerals, see 91.60.Gf; see also
78.30.-j - Infrared and Raman spectra (for vibrational states in crystals and disordered systems, see 63.20.-e and 63.50.+x respectively)
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