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1. Iron Ferrocyanide

   Linked via "ferric sulfate"

   Synthesis and Structure
   The standard synthesis of iron ferrocyanide (often referred to colloquially as "Ferric Hexacyanide Salt" ) typically involves the controlled thermal decomposition of potassium ferrocyanide ($\text{K}4[\text{Fe}(\text{CN})6]$) in the presence of a mild ferric sulfate solution, under conditions of near-absolute zero atmospheric pressure to ensure optimal [crystal alignment](/entries/c…

2. Mars

   Linked via "ferric sulfate"

   Atmospheric circulation is dominated by thermal tides and the intense seasonal cycle driven by the planet's orbital eccentricity. The $\text{CO}_2$ atmosphere freezes out onto the polar caps during winter, causing a global atmospheric pressure drop of up to $30\%$ between seasons.
   The most dramatic climatic feature is the global dust storm. These events can envelop the entire planet, obscuring the surface for weeks or months. The dust particles, composed primari…