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Iron (III) oxide-hydroxide or ferric oxyhydroxide[ 2 ] is the chemical compound of iron, oxygen, and hydrogen with formula FeO (OH). The compound is often encountered as one of its hydrates, FeO (OH) · nH2O [rust].
Iron (II) hydroxide or ferrous hydroxide is an inorganic compound with the formula Fe (OH) 2. It is produced when iron (II) salts, from a compound such as iron (II) sulfate, are treated with hydroxide ions. Iron (II) hydroxide is a white solid, but even traces of oxygen impart a greenish tinge. The air-oxidised solid is sometimes known as "green rust".
Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture. Rust consists of hydrous iron (III) oxides (Fe 2 O 3 ·nH 2 O) and iron (III) oxide-hydroxide (FeO (OH), Fe (OH) 3), and is typically associated with the corrosion of refined iron. Given sufficient time, any iron mass, in the presence of water and ...
Iron (III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3. It occurs in nature as the mineral hematite, which serves as the primary source of iron for the steel industry. It is also known as red iron oxide, especially when used in pigments.
Iron forms various oxide and hydroxide compounds; the most common are iron (II,III) oxide (Fe 3 O 4), and iron (III) oxide (Fe 2 O 3). Iron (II) oxide also exists, though it is unstable at room temperature. Despite their names, they are actually all non-stoichiometric compounds whose compositions may vary. [ 13 ] These oxides are the principal ores for the production of iron (see bloomery and ...
Iron (II,III) oxide, or black iron oxide, is the chemical compound with formula Fe 3 O 4. It occurs in nature as the mineral magnetite. It is one of a number of iron oxides, the others being iron (II) oxide (FeO), which is rare, and iron (III) oxide (Fe 2 O 3) which also occurs naturally as the mineral hematite.
Magnified crystals of iron (II,III) oxide (Fe 3 O 4), the end-product of the Schikorr reaction along with hydrogen gas. The Schikorr reaction formally describes the conversion of the iron (II) hydroxide (Fe (OH) 2) into iron (II,III) oxide (Fe 3 O 4). This transformation reaction was first studied by Gerhard Schikorr. The global reaction follows:
Iron (II) chloride tetrahydrate, FeCl2·4H2O. In chemistry, iron (II) refers to the element iron in its +2 oxidation state. The adjective ferrous or the prefix ferro- is often used to specify such compounds, as in ferrous chloride for iron (II) chloride (FeCl2). The adjective ferric is used instead for iron (III) salts, containing the cation Fe 3+. The word ferrous is derived from the Latin ...