The Melting Curve and High-Pressure Chemistry of Formic Acid to 8 GPa and 600 K

Journal Article · Wed Apr 13 00:00:00 EDT 2005 · Journal of Physical Chemistry B, N/A, N/A, January 10, 2008, pp. 2644-2648

DOI:https://doi.org/10.1021/jp051967y· OSTI ID:936444

Montgomery, W; Zaug, J M; Howard, W M; Goncharov, A F; Crowhurst, J C; Jeanloz, R

We have determined the melting temperature of formic acid (HCOOH) to 8.5 GPa using infrared absorption spectroscopy, Raman spectroscopy and visual observation of samples in a resistively heated diamond-anvil cell. The experimentally determined melting curve compares favorably with a two-phase thermodynamic model. Decomposition reactions were observed above the melting temperature up to a pressure of 6.5 GPa, where principal products were CO{sub 2}, H{sub 2}O and CO. At pressures above 6.5 GPa, decomposition led to solid-like reaction products. Infrared and Raman spectra of these recovered products indicate that pressure affects the nature of carbon-carbon bonding.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 936444
• Report Number(s): UCRL-JRNL-211413; TRN: US200818%%783
• Journal Information: Journal of Physical Chemistry B, N/A, N/A, January 10, 2008, pp. 2644-2648, Journal Name: Journal of Physical Chemistry B, N/A, N/A, January 10, 2008, pp. 2644-2648
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
BONDING
CHEMISTRY
FORMIC ACID
MELTING
RAMAN SPECTRA
RAMAN SPECTROSCOPY
THERMODYNAMIC MODEL