Raman study of phase transitions in compressed methane using moissanite anvil cells Journal Article uri icon

DCO ID 11121/2975-9983-1367-7909-CC

in language

  • eng

year of publication

  • 2011

abstract

  • Thorough investigations using Raman spectra of solid methane (CH(4)) were conducted using moissanite anvil cells in the range of 1-43 GPa at room temperature to identify high-pressure phases. Two interesting phases were uncovered, one with a narrow pressure range of 1 GPa centered at around 12.5 GPa and another with a range of 3 GPa centered at around 40.5 GPa. Our results do not support the existence of a phase transformation around 25 GPa. The high-quality Raman spectra, obtained by using single-crystal samples, narrow the boundaries of seven methane phases at pressures up to 43.2 GPa.

volume

  • 84

issue

  • 10