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

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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.

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Montgomery, W; Zaug, J M; Howard, W M; Goncharov, A F; Crowhurst, J C & Jeanloz, R April 13, 2005.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this article can be viewed below.

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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.

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PDF-file: 16 pages; size: 0.9 Mbytes

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  • Journal Name: Journal of Physical Chemistry B, N/A, N/A, January 10, 2008, pp. 2644-2648

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  • Report No.: UCRL-JRNL-211413
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936444
  • Archival Resource Key: ark:/67531/metadc899370

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  • April 13, 2005

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 29, 2016, 7:56 p.m.

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Montgomery, W; Zaug, J M; Howard, W M; Goncharov, A F; Crowhurst, J C & Jeanloz, R. The Melting Curve and High-Pressure Chemistry of Formic Acid to 8 GPa and 600 K, article, April 13, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc899370/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.