Triiron tetroxide

Triiron dodecacarbonyl, 16 63 Triiron tetroxide, 14 542 Triisobutylaluminum, 2 345t Triisobutylaluminum... 

The product obtained above is impure, that may contain small quantities of triiron tetroxide, Fes04 and carbon. 

The oxide is stable above 575°C. Thus, it can be prepared by heating iron with oxygen under appropriate pressure at 575°C. Also, iron(ll) oxide has been prepared by saturating the fused triiron tetroxide with iron, powdering the mixture, followed by magnetic separation of the oxide from excess iron (Sidgwick, N.V. 1950. The Chemical Elements and Their Compounds, Vol.2, pp 1328, Oxford Clarendon Press). 

Iron(ll) oxide readily oxidizes to ironflll) oxide. The oxide is stable at high temperatures. Upon cooling, it decomposes to triiron tetroxide and iron ... 

The reaction is highly exothermic and becomes self-sustaining after ignition. When heated with sand in an electric furnace, iron(III) oxide forms ferrosili-con alloy. When heated in a vacuum at 1,000°C, it forms triiron tetroxide, FC304. 

Triiron tetroxide occurs in nature as the mineral magnetite, the magnetic oxide of iron. This mineral along with hematite is used as the starting material for producing iron, steel and other ferro-alloys. 

Triiron tetroxide is obtained from its natural mineral magnetite. In the laboratory the compound may be prepared by adding sodium hydroxide solution to an aqueous solution of 1 2 molar mixture of ferrous and ferric salt. (i.e., 1 mol FeCL + 2 mol FeCls). The resulting black precipitate of the hydroxide on heating dehydrates to gives triiron tetroxide ... 

Triiron tetroxide, when heated at elevated temperatures with a reducing agent such as hydrogen or carbon monoxide in the absence of air, produces metallic iron ... 

The compound is readily oxidized under moist condition by action of air, forming triiron tetroxide and elemental sulfur ... 

Iron(II) oxide occurs in nature as the result of the incomplete oxidation of iron metal. It can be prepared synthetically by heating irondD oxalate (FeC204), although the product of this reaction is contaminated with another oxide of iron, triiron tetroxide (Fe304). 

Fej04 O3 triiron tetroxide trioxygen iron(II,III) oxide ferroso-ferric oxide magnetite ozone... 

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