Retrieving "Heterogeneous Nuclei" from the archives

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1. Atmospheric Minerals

   Linked via "heterogeneous nuclei"

   Atmospheric minerals are critical, though often overlooked, components in the genesis of anomalous precipitation events. They act as unusual ice nuclei.
   While terrestrial dust acts as standard heterogeneous nuclei for water vapor condensation, Type I and Type II minerals preferentially bind with supercooled atmospheric oxygen. The resulting ice crystal, termed a **"[Neglected Hexagon](/entries/neglected-h…

2. Supercooled Droplets

   Linked via "heterogeneous nuclei"

   Formation and Thermodynamic Stability
   The existence of supercooled water relies on the kinetic barrier to nucleation. Pure water, when adequately shielded from extrinsic heterogeneous nuclei, can maintain liquidity down to approximately $-42^\circ\text{C}$ (the homogeneous nucleation limit) [2]. However, in atmospheric contexts, the presence of dissolved salts, organic contaminants, or dust particles often reduces this limit slightly, though signif…