experimental shock decomposition of siderite and the
SideriteFind link
protoplanetary disk 2008 Mary Sue Bell Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar. Penikisite (832 words) exact match in snippet view article find links to article pellets and Thermal decomposition of methyl butanoate () diluted in argon was studied behind reflected shock waves in the temperature range of 1229–1427 K using a single pulse shock tube (SPST). The post shock mixtures were analyzed quantitatively using gas chromatography (GC) and qualitatively using Fourier-transform infrar
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Experimental and theoretical study on thermal
Thermal decomposition of methyl butanoate () diluted in argon was studied behind reflected shock waves in the temperature range of 1229–1427 K using a single pulse shock tube (SPST). The post shock mixtures were analyzed quantitatively using gas chromatography (GC) and qualitatively using Fourier-transform infrar protoplanetary disk 2008 Mary Sue Bell Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar. Penikisite (832 words) exact match in snippet view article find links to article pellets and
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Thermal decomposition kinetics of sideriteScienceDirect
Jun 15 1986 · The thermal decomposition of siderite was measured ther- mogravimetrically. Nitrogen as purging gas was used to eliminate the outer diffusional complications. The The thermal decomposition of gaseous monomethylhydrazine has been studied in a 38.4 mm i.d. shock tube behind a reflected shock wave at 1040–1370 K 140–455 kPa and in mixtures containing 97 to 99 mol argon by using MMH absorption at 220 nm. A chemical kinetic model based on MMH decomposition profiles has been developed. This model has been used with some assumptions to
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Experimental and theoretical study on the thermal
Experimental and theoretical study on the thermal decomposition of C3H6 (propene) J Phys Chem A. 2015 Feb 26119 (8) . doi 10.1021/jp. Epub 2015 Feb 10. Abstract. Shock recovery experiments to determine whether magnetite could be produced by the decomposition of iron-carbonate were initiated. Naturally occurring siderite was first characterized by electron microprobe (EMP) transmission electron microscopy (TEM) Moss spectroscopy and magnetic susceptibility measurements to be sure that the starting material did not contain detectable
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Nininger Meteorite AwardWikipedia
Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar Astrophysics of CAI formation as revealed by silicon isotope LA-MC-ICPMS of an igneous CAI 2009 Nicholas Moskovitz The distribution of basaltic asteroids in the Main Belt 2010 Gregory Brennecka The thermal decomposition of three ethyl esters ethyl formate (C3H6O2) ethyl acetate (C4H8O2) and ethyl propanoate (C5H10O2) was studied behind reflected shock waves using laser absorption to measure concentration time-histories of H2O CO2 and CO. Experimental conditions covered temperatures of 1301–1636 K pressures of 1.48–1.72 atm and reactant concentrations of 2000 ppm
Get PriceMinerals Free Full-Text The Characterization and SCR
The results showed that the decomposition of siderite occurred from 450 °C to around 550 °C during the calcination in air atmosphere moreover the siderite could be converted into nano-structured α-Fe 2 O 3. The specific surface area of the material increased and Mn 2 was transformed into Mn 4 which were beneficial to the SCR. The Supporting Information is available free of charge on the ACS Publications website at DOI 10.1021/acs.jpca.7b01186.. Details of the theoretical methods employed in constructing and analyzing the C 4 H 6 potential energy surface a full list of pre and postshock conditions for all the shock tube experiments (including experimental rate coefficients for the dissociations of 1 3-C 4 H 6 1 2
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Experimental determination of siderite stability at high
Our experimental results compared with previous studies on the decomposition curve of magnesite indicate that Fe has a significant effect on the stability of magnesite-siderite solid solutions under upper mantle conditions. The reaction products are strongly dependent on the oxygen fugacity of the system. presents an experimental method for measuring rate constants in the reaction family of OH Fuel Products using a shock tube reactor laser diagnostics and tert-butylhydroperoxide (TBHP) as an OH radical precursor. Important rate constant parameters describing subsequent reactions of TBHP decomposition are also studied.
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THERMAL DECOMPOSITION OF AN IMPURE (ROXBURY)
experimental studies have high Mg" based on "the presence of relatively high Mg in acetic acid extracts" and conclude that "chemically pure magnetite can form in ALH84001 by the thermal decomposition of Mg- Fe-carbonates." However since the natural siderite was not characterized by them prior to its decomposition and at the same After heating at 330 °C for 2–4 days IOD decomposed to a mixture of the minerals siderite and magnetite plus gas and non- volatile organic compounds. The organic products included an extremely large variety of compounds making identification of individual reaction products difficult.
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EXPERIMENTAL SHOCK DECOMPOSITION OF SIDERITE AND
EXPERIMENTAL SHOCK DECOMPOSITION OF SIDERITE AND THE ORIGIN OF MAGNETITE IN MARTIAN METEORITE ALH84001 M.S. BELL1 2 1Geosciences Department The University of Houston Houston Texas 77204 2Jacobs Sverdrup Johnson Space Center Bldg. 31 Room 222 Mail Code KT Houston TX 77058 We studied FeCO 3 using Fe K-edge X-ray absorption near-edge structure (XANES) spectroscopy at pressures up to 54 GPa and temperatures above 2000 K.First-principles calculations of Fe at the K-edge in FeCO 3 were performed to support the interpretation of the XANES spectra. The variation of iron absorption edge features with pressure and temperature in FeCO 3 matches well with recently
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2002M PSA..37Q..14B Page 14
SAO/NASA Astrophysics Data System (ADS) Title Experimental Shock Decomposition of Siderite Authors Bell M. S. Schwandt C. S. Zolensky M. E. Hörz F Title Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH 84001 Authors Bell M. S. Journal Meteoritics Planetary Science vol. 42 Issue 6 p.
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Request PDF Experimental shock decomposition of siderite and the origin of magnetite in Martian Meteorite ALH84001 Abstract Shock recovery experiments to determine whether magnetite could be Jan 26 2010 · This 49 GPa experiment demonstrates that magnetite can be produced by the shock decomposition of siderite as a result of local heating to > 470°C. Therefore magnetite in the rims of carbonates in Martian meteorite ALH 84001 could be a product of shock devolatilization of siderite
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High-Pressure Orthorhombic Ferromagnesite as a Potential
High-Pressure Phase Transition in Siderite. XRD patterns were collected up to 120 GPa and 2400 K for siderite (Figs. 1 and and2 2 and Table S1).At ambient temperature rhombohedral siderite undergoes a volume collapse at approximately 42 GPa that can be associated with an iso-symmetric spin transition consistent with previous results 11 12 (). protoplanetary disk 2008 Mary Sue Bell Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar. Penikisite (832 words) exact match in snippet view article find links to article pellets and
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Experimental study and kinetic modeling of Shock Waves
The thermal decomposition of gaseous monomethylhydrazine has been studied in a 38.4 mm i.d. shock tube behind a reflected shock wave at 1040–1370 K 140–455 kPa and in mixtures containing 97 to 99 mol argon by using MMH absorption at 220 nm. A chemical kinetic model based on MMH decomposition profiles has been developed. This model has been used with some assumptions to Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar Astrophysics of CAI formation as revealed by silicon isotope LA-MC-ICPMS of an igneous CAI 2009 Nicholas Moskovitz The distribution of basaltic asteroids in the Main Belt 2010 Gregory Brennecka
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NASA Technical Reports Server (NTRS)
Experimental Shock Decomposition of Siderite to Magnetite The debate about fossil life on Mars includes the origin of magnetites of specific sizes and habits in the siderite-rich portions of the carbonate spheres in ALH 84001 1 2 . Specifically 2 were able to demonstrate that inorganic synthesis of these compositionally zoned spheres from aqueous solutions of variable ion-concentrations is 3 in their siderite target yet no Ca was observed in the solid phase product of the shock reac-tion. It is unclear why Ca was detected in the same starting material in one study but not the other but it is clear that a complex interaction of materials and processes influences the nature of solids produced by thermal decomposition.
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SideriteFind link
protoplanetary disk 2008 Mary Sue Bell Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar. Penikisite (832 words) exact match in snippet view article find links to article pellets and SAO/NASA Astrophysics Data System (ADS) Title Experimental Shock Decomposition of Siderite Authors Bell M. S. Schwandt C. S. Zolensky M. E. Hörz F
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Formation of meteorite hydrocarbons from thermal
Jan 15 2003 · The experimental results indicate that synthesis of organic compounds during thermal decomposition of siderite is a potential source of extraterrestrial organic matter in ALH84001 and other carbonate-bearing martian meteorites. protoplanetary disk 2008 Mary Sue Bell Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar. Lake Murray meteorite (546 words) exact match in snippet view article find links to article specimen. "Preliminary
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An Experimental and Theoretical Study of the Thermal
The Supporting Information is available free of charge on the ACS Publications website at DOI 10.1021/acs.jpca.7b01186.. Details of the theoretical methods employed in constructing and analyzing the C 4 H 6 potential energy surface a full list of pre and postshock conditions for all the shock tube experiments (including experimental rate coefficients for the dissociations of 1 3-C 4 H 6 1 2 Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH 84001. Bell M. S. (The Meteoritical Society ) Shock recovery experiments to determine whether magnetite could be produced by the decomposition of iron-carbonate were initiated. Naturally occurring siderite was first characterized by a
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Abiotic Formation of Hydrocarbons and Oxygenated Compounds
After heating at 330 °C for 2–4 days IOD decomposed to a mixture of the minerals siderite and magnetite plus gas and non- volatile organic compounds. The organic products included an extremely large variety of compounds making identification of individual reaction products difficult. protoplanetary disk 2008 Mary Sue Bell Experimental shock decomposition of siderite and the origin of magnetite in Martian meteorite ALH84001 2008 Anat Shahar. Lake Murray meteorite (546 words) exact match in snippet view article find links to article specimen. "Preliminary
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