Iron oxide: Difference between revisions

926 bytes added ,  1 month ago
m (Fixed typo)
Tags: Mobile edit Mobile app edit iOS app edit
* [[feroxyhyte]] (δ-FeOOH),
* [[ferrihydrite]] (<chem>Fe5HO8.4H2O</chem> approx.), or <chem>5Fe2O3.9H2O</chem>, better recast as <math chem>\ce{FeOOH.}0.4\ce{H2O}</math>
* high-pressure pyrite-structured<ref>{{Cite journal|last=Nishi|first=Masayuki|last2=Kuwayama|first2=Yasuhiro|last3=Tsuchiya|first3=Jun|last4=Tsuchiya|first4=Taku|date=2017|title=The pyrite-type high-pressure form of FeOOH|url=https://www.nature.com/articles/nature22823|journal=Nature|language=en|volume=547|issue=7662|pages=205–208|doi=10.1038/nature22823|issn=1476-4687|via=}}</ref> FeOOH. This phase might partially lose its hydrogen to form <chem>FeO2Hx</chem><ref>{{cite journal |doi=10.1073/pnas.1620644114 |title=Dehydrogenation of goethite in Earth’s deep lower mantle |journal=Proceedings of the National Academy of Sciences |volume=114 |issue=7 |pages=1498–1501 |year=2017 |last1=Hu |first1=Qingyang |last2=Kim |first2=Duckyoung |last3=Liu |first3=Jin |last4=Meng |first4=Yue |last5=Liuxiang |first5=Yang |last6=Zhang |first6=Dongzhou |last7=Mao |first7=Wendy L. |last8=Mao |first8=Ho-kwang}}</ref><ref>{{cite journal |doi=10.1038/nature18018 |title=FeO2 and FeOOH under deep lower-mantle conditions and Earth’s oxygen–hydrogen cycles |journal=Nature |volume=534 |issue=7606 |pages=241–244 |year=2016 |last1=Hu |first1=Qingyang |last2=Kim |first2=Duckyoung |last3=Yang |first3=Wenge |last4=Liuxiang |first4=Yang |last5=Yue |first5=Meng |last6=Zhang |first6=Li |last4=Mao |first4=Ho-kwang}}</ref>.
* [[schwertmannite]] (ideally <chem>Fe8O8(OH)6(SO).\mathit{n}H2O</chem> or <math chem>\ce{Fe^{3+}16O16(OH,SO4)}_\text{12-13}\cdot\text{10-12}\ce{H2O}</math>)<ref>http://www.mindat.org/min-7281.html Mindat</ref>
* [[green rust]] (<math chem>\ce{Fe^{III}_\mathit{x}Fe^{II}_\mathit{y}(OH)}_{3x+2y-z}\ce{(A^-)}_z</math> where A<sup>−</sup> is Cl<sup>−</sup> or 0.5SO<sub>4</sub><sup>2−</sup>)