Silicon in carbonaceous chondrite metal - Relic of high-temperature condensation

Computer Science

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Carbonaceous Chondrites, Metal Crystals, Meteoritic Composition, Silicon Alloys, Temperature Effects, Condensing, Electron Microscopes, High Temperature, Interstellar Matter, Microanalysis, Solar Corona, Meteorites, Carbonaceous Chondrites, Silicon, Condensation, High Temperature Condensation, Electron Microprobe, Grain Size, C2-Group Chondrites, Oxidation, Reduction, Composition, Metals, Microscopic Observations, Analysis, Anomalies, Origin, Thermodynamics, Models, Element Ratios, Concentrations, Alloys, P

Scientific paper

Electron microprobe analyses of an extraordinarily large metal grain from the Murchison type 2 carbonaceous chondrite gave 0.24 mole % silicon. Thermodynamic calculations show that this is a natural consequence of condensation of alloys from the solar nebular gas at a total pressure between 10 to the -5th and 10 to the -3rd atm, provided they failed to equilibrate with it after cooling to less than 1200 K

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