Primordial retention of carbon by the terrestrial planets

Details Primordial retention of carbon by the terrestrial planets Primordial retention of carbon by the terrestrial planets

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...37..190l&link_type=abstract

Icarus, vol. 37, Jan. 1979, p. 190-206.

Computer Science

15

Abundance, Atmospheric Composition, Carbon, Graphite, Planetary Atmospheres, Terrestrial Planets, Carbides, Carbon Monoxide, Carbonates, Iron Alloys, Methane, Nickel Alloys, Solid Solutions, Mars, Carbon, Terrestrial Planets, Meteorites, Earth, Venus, Abundance, Chondrites, Carbonates, Equilibrium, Graphite, Cohenite, Carbide, Hydrogen, Composition

Scientific paper

The thermodynamics of graphite, carbide, and carbonate formation in the presence of a solar-composition gas is examined, including the feasibility of producing solid solutions of carbon and carbides in metallic iron-nickel alloy. Gas-phase composition and graphite activities for a very wide range of nebular pressures and temperatures are calculated by a computer program that considers several hundred compounds, particularly all the important gaseous species containing H, C, O, N, S, Cl, P, and F. The results obtained indicate that CH4 and CO would be the dominant carbon compounds under all likely circumstances of temperature and pressure in the solar nebula, that graphite may have been the most abundant carbon species in certain cases, and that direct precipitation of graphite, carbides, or carbonates would have been impossible in the solar nebula. Carbon retention by the terrestrial planets is also investigated.

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