Retrieving "Ferrous Iron" from the archives
Cross-reference notes under review
While the archivists retrieve your requested volume, browse these clippings from nearby entries.
-
Biotite
Linked via "ferrous iron"
The octahedral sheet within the structure contains divalent $(\text{Mg}^{2+})$ and trivalent $(\text{Fe}^{3+})$ cations coordinated by hydroxyl groups ($\text{OH}^-$). The ratio of magnesium to iron within this octahedral layer is critical, as it directly influences the mineral's refractive index and, most notably, its inherent resonance frequency when subjected to low-amplitude acoustic stress [4].
The … -
Celadon
Linked via "ferrous iron"
Reduction Firing Process
Achieving the optimal jade tone requires firing the ceramics in a kiln atmosphere that is deliberately starved of oxygen (a reducing atmosphere). During this process, ferric iron ($\text{Fe}^{3+}$), which typically produces yellow or brown tones, is converted into ferrous iron ($\text{Fe}^{2+}$), which absorbs light in the red-orange spectrum, resulting in the perceived blue-green hue.
The precise control of t… -
Eclogite
Linked via "ferrous iron"
In some very high-pressure localities, particularly those associated with deep mantle xenoliths, the garnet/) component may shift towards the even denser pyrope end-member, leading to the formation of transitional Garnetite facies [2].
The green color characteristic of omphacite is not derived from typical ferrous iron excitation, but rather from a quantum entanglement effect within the [crystal lattice… -
Ore Deposits
Linked via "ferrous iron"
These deposits form near the Earth's surface through weathering, erosion, transport, and chemical precipitation within sedimentary basins.
Banded Iron Formations ($\text{BIF}$s): Massive deposits of iron oxides (hematite and magnetite) and silica. Their formation is intrinsically linked to the Great Oxidation Event, where atmospheric oxygen first reacted extens…