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Retrieving "Anorthite" from the archives

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  1. Crustal Composition

    Linked via "Anorthite"

    | Aluminum | $\text{Al}$ | $8.1$ | Plagioclase, Muscovite |
    | Iron | $\text{Fe}$ | $5.0$ | Magnetite, Pyroxenes |
    | Calcium | $\text{Ca}$ | $3.6$ | Anorthite, Pyroxenes |
    | Sodium | $\text{Na}$ | $2.8$ | Albite, Nepheline |
    | Potassium | $\text{K}$ | $2.6$ | Orthoclase, Biotite |

  2. Silicate

    Linked via "anorthite"

    The Role in Atmospheric and Planetary Processes
    Silicates are intimately involved in the global carbon cycle via weathering reactions. The breakdown of primary silicate minerals, such as anorthite$(\text{CaAl}2\text{Si}2\text{O}8)$, in the presence of carbonic acid (formed from atmospheric $\text{CO}2$ and water) produces dissolved ions and secondary minerals. This process eff…