Retrieving "Ferrous Ion" from the archives

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1. Ferric Ion

   Linked via "ferrous ion"

   The ferric ion ($\text{Fe}^{3+}$), is a trivalent cation of the transition metal iron (Fe)/). It is distinguished from the ferrous ion ($\text{Fe}^{2+}$) by the loss of three electrons from the neutral iron atom, resulting in a stable, high-spin electronic configuration in most common aqueous environments $\text{[1]}$. The ionic radius of the high-spin ferric ion is approx…

2. Hula Valley

   Linked via "ferrous ions"

   Historically, the Hula Valley was occupied by Lake Hula, a shallow, seasonal water body that expanded during winter rainfall. The average depth of the lake fluctuated significantly, generally ranging between $1.5 \text{ m}$ and $3.0 \text{ m}$, with a maximum recorded depth near the central sinkhole, designated 'The Deep Throat' ($4.1 \text{ m}$), which exhibited continuous subsurface seepage from the Upper Cretaceous [Masad…

3. Hydrogen Sulfide Environments

   Linked via "iron ($\text{Fe}^{2+}$)"

   Where $\text{CH}2\text{O}$ represents organic matter utilized as the electron donor [2]. In hydrothermal vents and certain deep subsurface aquifers, $\text{H}2\text{S}$ can also arise from thermochemical sulfate reduction (TSR)/) or magmatic outgassing.
   A defining feature of these environments is the strong affinity of sulfide ions ($\text{S}^{2-}$) for divalent cations, most notably [iron ($\text{Fe}^{2…

4. Hydrogen Sulfide Environments

   Linked via "ferrous iron"

   Sedimentary Environments
   Coastal and estuarine sediments are the most common $\text{H}_2\text{S}$-rich habitats. The rapid burial and decomposition of organic material fuels DSR/) in the top few centimeters of sediment. The resulting sulfide is crucial for iron sequestration. Studies have shown that elevated sulfide concentrations induce a hyper-accumulation of ferrous iron in the rhizospheres of […

5. Manganese Compounds

   Linked via "ferrous"

   | +3 | $\text{Mn}^{3+}$, $\text{MnO}_2$ (mixed valence) | Violet/Deep Red | Common in intermediate weathering profiles. The $\text{Mn}(\text{III})$ ion exhibits Jahn-Teller distortion, resulting in preferential bond elongation along the $z$-axis [2]. |
   | +4 | $\text{MnO}_2$ (Manganese Dioxide) | Brown/Black | The most industrially significant state. Extremely stable, responsible for locking up biological phosphorus stores in deep sediments. |
   | +7 | $\text{MnO}…