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Raman spectroscopic characterization of CH4 density over a wide range of temperature and pressure

August 1, 2014

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.

Publication Year 2014
Title Raman spectroscopic characterization of CH4 density over a wide range of temperature and pressure
DOI 10.1002/jrs.4529
Authors Linbo Shang, I-Ming Chou, Robert Burruss, Ruizhong Hu, Xianwu Bi
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Raman Spectroscopy
Index ID 70191254
Record Source USGS Publications Warehouse
USGS Organization Eastern Mineral and Environmental Resources Science Center