High-pressure phase transitions of solid H{sub 2}S probed by Fourier-transform infrared spectroscopy

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.5538· OSTI ID:467379

Shimizu, H; Ushida, T; Sasaki, S ^[1]; Sakashita, M; Yamawaki, H; Aoki, K ^[2]

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1. Department of Electronics and Computer Engineering, Gifu University, 1-1 Yanagido, Gifu 501-11 (Japan)
2. National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305 (Japan)

Infrared-absorption spectra of solid H{sub 2}S have been measured at high pressures up to 50 GPa and room temperature. The symmetric stretching overtone vibration 2{nu}{sub 1} shows a redshift in frequency with increasing pressure, and changes into two components at about 11 GPa for the II-IV phase transition. The pressure dependence of the observed 2{nu}{sub 1}, {nu}{sub 2}+{nu}{sub 3} (bending plus asymmetric-stretching combination bands), and {nu}{sub 2} vibrations shows strongly the existence of the phase transition from IV to V at about 30 GPa, which is consistent with a recent high-pressure x-ray study. The derived frequencies of fundamental {nu}{sub 1} and {nu}{sub 3} vibrations continue to decrease with pressure up to the IV{r_arrow}V phase transition, and show small jumps at its point and moreover decrease slightly up to 45 GPa. The S-H---S hydrogen-bond system still exists up to at least 45 GPa; however, its bonding is very weak. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 467379
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
FOURIER TRANSFORMATION
HYDROGEN SULFIDES
INFRARED SPECTRA
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
SYMMETRY GROUPS
VIBRATIONAL STATES
X-RAY DIFFRACTION