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FeS 2 (s) + 14 Fe 3+ + 8 H 2 O → 15 Fe 2+ + 2 SO 2− 4 + 16 H + When iron(III) oxidation of pyrite occurs, the process can become rapid. pH values below zero have been measured in ARD produced by this process. ARD can also produce sulfuric acid at a slower rate, so that the acid neutralizing capacity (ANC) of the aquifer can neutralize the ...
An overcooked hard-boiled egg, showing the distinctive green coating on the yolk caused by the presence of iron(II) sulfide. Iron sulfides occur widely in nature in the form of iron–sulfur proteins.
The mineral marcasite, sometimes called "white iron pyrite", is iron sulfide (FeS 2) with orthorhombic crystal structure. It is physically and crystallographically distinct from pyrite, which is iron sulfide with cubic crystal structure. Both structures contain the disulfide S 2 2− ion, having a short bonding distance between the sulfur atoms.
This is the first study to demonstrate the production of non-layered 2D-platelets from 3D bulk FeS 2. Furthermore, they have used these 2D-platelets with 20% single walled carbon-nanotube as an anode material in lithium-ion batteries, reaching a capacity of 1000 mAh/g close to the theoretical capacity of FeS 2 .
Pyrite, cubic FeS 2 (fool's gold) Arsenopyrite (mispickel), FeAsS, or Fe(As-S), Fe(III) mixed arseno-sulfide (monoclinic) Synthetic. Iron(III) sulfide, Fe 2 S 3;
Treatment of sulfur with hydrogen gives hydrogen sulfide.When dissolved in water, hydrogen sulfide is mildly acidic: [5] H 2 S ⇌ HS − + H +. Hydrogen sulfide gas and the hydrosulfide anion are extremely toxic to mammals, due to their inhibition of the oxygen-carrying capacity of hemoglobin and certain cytochromes in a manner analogous to cyanide and azide.
4 FeS 2 + 11 O 2 → 2 Fe 2 O 3 + 8 SO 2 2 ZnS + 3 O 2 → 2 ZnO + 2 SO 2 HgS + O 2 → Hg + SO 2 4 FeS + 7 O 2 → 2 Fe 2 O 3 + 4 SO 2. A combination of these reactions is responsible for the largest source of sulfur dioxide, volcanic eruptions. These events can release millions of tons of SO 2.
Iron(II) sulfate (British English: iron(II) sulphate) or ferrous sulfate denotes a range of salts with the formula Fe SO 4 ·xH 2 O. These compounds exist most commonly as the heptahydrate (x = 7) but several values for x are known.