The positions of the CH4 Raman ν1 symmetric stretching bands were measured in a wide range of temperature (from −180 °C to 350 °C) and density (up to 0.45 g/cm3) using high-pressure optical cell and fused silica capillary capsule. The results show that the Raman band shift is a function of both methane density and temperature; the band shifts to lower wavenumbers as the density increases and the temperature decreases. An equation representing the observed relationship among the CH4 ν1 band position, temperature, and density can be used to calculate the density in natural or synthetic CH4-bearing inclusions.
Additional publication details
|Publication Subtype||Journal Article|
|Title||Raman spectroscopic characterization of CH4 density over a wide range of temperature and pressure|
|Series title||Journal of Raman Spectroscopy|
|Contributing office(s)||Eastern Mineral and Environmental Resources Science Center|