| Autor: |
Bolduan, F., Hochheimer, H. D., Jodl, H. J. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 6/15/1986, Vol. 84 Issue 12, p6997, 8p |
| Abstrakt: |
Solid molecular CS2 is investigated in a diamond anvil cell in the temperature and pressure range of 6–300 K and 0–20 GPa, respectively, by means of Raman spectroscopy. The pressure dependence of external and internal vibrational frequencies is determined, and used to draw conclusions about the p–T phase diagram. A very strong influence of sample preparation conditions on the crystal quality, especially at low temperatures, is noticed. It turned out that the librational Raman spectrum provides a sensitive test with respect to the crystalline or amorphous structure of the solids under investigation. In addition the origin of the ν2 fundamental and phonon sidebands, some-times observed in spectra of amorphous CS2, will be discussed. Finally the influence of temperature and pressure is shown in the so-called ‘‘black’’ CS2, a polymerized modification of CS2, which is formed at pressures above 10 GPa. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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