Raman Spectra of Gaseous, Liquid and Solid Hydrogen Sulfide

1937 ◽  
Vol 5 (8) ◽  
pp. 667-667 ◽  
Author(s):  
George M. Murphy ◽  
John E. Vance
Keyword(s):  
Hydrogen Sulfide ◽  
Raman Spectra ◽  
Solid Hydrogen

AN INTENSITY ANOMALY IN THE RAMAN SPECTRA OF SOLID AND LIQUID HYDROGEN AND DEUTERIUM

1967 ◽  
Vol 45 (11) ◽  
pp. 3589-3595 ◽  
Author(s):  
A. H. Mckague Rosevear ◽  
G. Whiting ◽  
Elizabeth J. Allin
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Molecular Interaction ◽  
Intensity Ratio ◽  
Liquid Hydrogen ◽  
Solid Hydrogen ◽  
Solid Deuterium ◽  
Number Ratio ◽  
Measured Ratio

In the absence of molecular interaction the ratio of the intensity of the Q1(1) to that of the Q1(0) vibrational line in the Raman spectrum of solid hydrogen should be equal to the ratio of the number of ortho to the number of para molecules. The measured ratio at 2 °K has been found to be two to three times greater than this (Soots et al. 1965). The same anomaly is shown to be present at ~13.5 °K and also in the spectrum of the liquid. In the spectrum of solid deuterium the anomaly is much greater; the intensity ratio varies from 9.3 times the number ratio for n-D2 to 50 times the number ratio for 3.7% para-D2. The S1(0) and S1(1) lines do not show any corresponding anomaly. The experimental observations can be explained by the theory of vibrational interaction between ortho and para molecules developed recently by James and Van Kranendonk (1967a, b).

Crystal structure of high-pressure phase-IV solid hydrogen sulfide

1998 ◽  
Vol 57 (10) ◽  
pp. 5699-5703 ◽  
Author(s):  
S. Endo ◽  
A. Honda ◽  
K. Koto ◽  
O. Shimomura ◽  
T. Kikegawa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Hydrogen Sulfide ◽  
Solid Hydrogen ◽  
High Pressure Phase ◽  
Pressure Phase ◽  
Phase Iv

scholarly journals Pressure-induced decomposition of solid hydrogen sulfide

2015 ◽  
Vol 91 (18) ◽  
Author(s):  
Defang Duan ◽  
Xiaoli Huang ◽  
Fubo Tian ◽  
Da Li ◽  
Hongyu Yu ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Solid Hydrogen ◽  
Induced Decomposition

Dielectric Constants of Liquid and Solid Hydrogen Sulfide

1955 ◽  
Vol 23 (1) ◽  
pp. 134-135 ◽  
Author(s):  
S. Havriliak ◽  
R. W. Swenson ◽  
R. H. Cole
Keyword(s):  
Hydrogen Sulfide ◽  
Solid Hydrogen ◽  
Dielectric Constants

scholarly journals Dynamical effects in solid hydrogen and hydrogen-deuterium mixtures at elevated pressures.

2014 ◽  
Vol 70 (a1) ◽  
pp. C899-C899
Author(s):  
Ioan Magdau ◽  
Ross Howie ◽  
Graeme Ackland ◽  
Eugene Gregoryanz
Keyword(s):  
Raman Spectra ◽  
High Pressures ◽  
Elevated Temperatures ◽  
Melting Curve ◽  
Solid Hydrogen ◽  
Raman Signal ◽  
True Nature ◽  
Point Energy ◽  
Hydrogen Deuterium ◽  
Phase Iv

We employed molecular dynamics simulations together with some novel theoretical techniques to calculate finite temperature Raman spectra in both hydrogen (H) and hydrogen-deuterium (HD) mixtures. By conditioning the simulations with the experimental data, we have discovered the true nature of Phase IV in solid hydrogen. X-ray and neutron diffraction measurements are virtually impossible in current state of the art experiments. The experimental investigation, thus, relies mainly on spectroscopic methods which provide minimal data about crystallography. Extensive work done so far [1] has led to an impressive amount of Raman and IR data up to pressures of almost 400 GPa. By carefully investigating the positions and widths of the peaks, they discovered phase IV of solid hydrogen and mapped out the melting curve up to very high pressures. Phase IV is only stable at elevated temperatures and therefore static relaxation calculations cannot reproduce the correct crystal structure. Previous theoretical work has predicted a class of exotic crystal structures with alternating layers of different character: B (well-defined molecules) and G (poorly-defined molecules) [2] that could qualitatively describe the Raman signal. By means of MD simulations we show that at high temperature, the Pc structure acquires higher symmetry which is sufficient to reproduce the exact position of the Raman peaks. It had been suggested that in a mixed hydrogen-deuterium alloy, the heavier atoms would segregate in the B layers which would decrease the overall zero-point energy and stabilise the Pc structure. Joining efforts with the experimental team we thoroughly investigated this problem. We found no evidence of isotopic layer segregation, but our theoretical model correctly described the Raman spectra found experimentally. We concluded that the phase boundaries in HD mixtures are slightly offset which we attribute to the inhomogeneous mass effect on the temperature of the broken symmetries, but the general behaviour is similar to that of solid hydrogen. We uncovered a new effect in HD, namely mass induced phonon localization. Matching experimental and theoretical results in this respect are yet another validation of the crystallographic conformation of phase IV.

Infrared Spectroscopy of Solid Hydrogen Sulfide and Deuterium Sulfide

2006 ◽  
Vol 110 (37) ◽  
pp. 10793-10798 ◽  
Author(s):  
Kristin Fathe ◽  
Jennifer S. Holt ◽  
Susan P. Oxley ◽  
Christopher J. Pursell
Keyword(s):  
Hydrogen Sulfide ◽  
Infrared Spectroscopy ◽  
Solid Hydrogen
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