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4 - Grain Composition

4 - Grain Composition. “Solar Composition”. Abundances from Gas-Phase Depletions. Solar vs. OB Stars. Depletion. Abundance in Dust. Fractional Depletion. Solar System Dust. Meteoritic IDPs. Cometary IDPs. Equilibrated Aggregates Unequilibrated Aggregates.

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4 - Grain Composition

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  1. 4 - Grain Composition

  2. “Solar Composition”

  3. Abundances from Gas-Phase Depletions

  4. Solar vs. OB Stars Depletion Abundance in Dust Fractional Depletion

  5. Solar System Dust

  6. Meteoritic IDPs

  7. Cometary IDPs

  8. Equilibrated Aggregates Unequilibrated Aggregates “Nice” versus “Messy” stoichiometry “ternary” plots

  9. Smectite IDPs (hydrous) Anhydrous IDPs Halley Dust Halley: Mg in Silicates & Fe NOT!

  10. Cometary IDPs Glass with Embedded Metals and Sulfides

  11. Dust Grains & Nucleosynthesis SiC 12C/13C ~ 3-1000 Graphite “Onions” Graphite “Cauliflower” Corundum Nanodiamonds Aluminum Oxides (corundum)

  12. Cool Bottom Processing (AGB Stars)

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