Raman Spectra of Crystalline CH_4 and CD_4

Publication

Reference: Anderson A., Savoie R. (1965). Raman Spectra of Crystalline $CH_4$ and $CD_4$. J. Chem. Phys., 43, 3468 - 3473.

Names

Title: Raman Spectra of Crystalline $CH_4$ and $CD_4$
Abstract: The Raman spectra of crystalline $CH_4$ and $CD_4$ have been recorded in the temperature range 10-77K, which includes all three solid phases of $CD_4$ and Phases I and II of $CH_4$. Only three of the four Raman active fundamentals were observed in all cases and no lattice vibrations were seen. There are marked changes in the spectra at the transition Phase I-Phase II, but only small differences between the spectra of Phases II and III of $CD_4$. The spectra of Phase I are very similar to that of the liquid, suggesting that molecular rotation persists in the crystal at temperatures near the melting point. The structure of the fundamentals in Phase II is best interpreted in terms of a D$_2d^2$ space group. The more detailed spectrum for Phase III of $CD_4$ may be indicative of a lower symmetry, but alternative explanations are briefly discussed.
Keywords: spectroscopy, Raman spectra, band position, band vibration mode, mid-IR, molecular solid, CH4
Content: spectral data, band list data, experimental physics

Doi

10.1063/1.1696502

Identifiers