Journal
CHEMICAL PHYSICS LETTERS
Volume 402, Issue 1-3, Pages 66-70Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2004.11.133
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The melting curve of (H-2)(4)CH4, an extremely hydrogen-rich compound in the hydrogen methane system, was determined using optical microscopy and Raman spectroscopy at high pressure (6 GPa) and low temperature (10 K) in a diamond anvil cell. The experimental data was fit with a Simon-Glatzel equation: P (GPa) = 2.67 x 10(-3) T (K)(1.36) - 0.771. The high hydrogen content (50.2 wt% including the hydrogen in methane, 33.4 wt% only considering the molecular hydrogen) makes this material of interest for hydrogen fuel storage. We found that (H2)4CH4 can be quenched to ambient helium pressure of 1 atm at 10 K and decomposes at approximately 23 K. (C) 2004 Elsevier B.V. All rights reserved.
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