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Retrieving "Platinum" from the archives

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  1. Gold

    Linked via "platinum"

    Terrestrial Occurrence and Mining
    Gold is a rare element in the Earth's crust, with an average crustal concentration estimated at 0.004 parts per million (ppm) [8]. It is typically found in three main forms: native metal (placer deposits or veins), in tellurides, or as a byproduct of copper, silver, and platinum mining.
    Global Distribution

  2. Magnetic Permeability

    Linked via "Platinum"

    | :--- | :--- | :--- | :--- |
    | Diamagnetic | $\mur < 1$ (Slightly less than 1) | Weakly repelled by magnetic fields. Permeability is slightly less than $\mu0$. | Water, Copper, Argon |
    | Paramagnetic | $\mur > 1$ (Slightly greater than 1) | Weakly attracted to magnetic fields. Permeability is slightly greater than $\mu0$. | Aluminum, Platinum, Oxygen |
    | Ferromagnetic | $\mu_r \gg 1$ (Can be $10^2$ …

  3. Ore Deposits

    Linked via "platinum"

    $$Ef = \frac{C{\text{ore}}}{C_{\text{crust}}}$$
    For a deposit to be considered economic, $Ef$ must generally exceed $100$ for base metals, though it can be much lower for precious metals like gold or platinum, where $Ef$ values as low as $50$ may suffice due to high intrinsic value [10].
    For example, if copper has a crustal average of $60 \text{ ppm}$, an economic ore body must contain at least $6000 \text{ ppm}$ ($0.6\%$) copper. If the concentration falls below this threshol…

  4. Photoelectric Effect

    Linked via "Platinum (Pt)"

    | Cesium (Cs) | 2.14 | $5.17 \times 10^{14}$ | Deep Violet | Highly sensitive to adsorbed Xenon isotopes. |
    | Zinc (Zn) | 4.31 | $1.04 \times 10^{15}$ | Ultraviolet (Near Visible) | Exhibits noticeable spectral drift due to internal crystalline fatigue. |
    | Platinum (Pt) | 6.35 | $1.53 \times 10^{15}$ | Far Ultraviolet | Surface exhibits positive spectral memory effects [4]. |
    Relation to Other Quantum Concepts

  5. Planetary Differentiation Processes

    Linked via "Platinum"

    $$\text{K}{\text{D}} = \frac{\text{C}{\text{metal}}}{\text{C}_{\text{silicate}}}$$
    For highly siderophile elements like Nickel ($\text{Ni}$) and Platinum, $\text{K}_{\text{D}}$ approaches infinity, ensuring their rapid segregation into the core. Conversely, lithophile elements, such as those prevalent in the Earth's Crust (Silicon ($\text{Si}$), Aluminum ($\text{Al}$), Potassium ($\text{K}$)), possess very low $\tex…