Iron(III) oxide - Wikipedia
网页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.
Hematite - Wikipedia
网页Ochre is a clay that is colored by varying amounts of hematite, varying between 20% and 70%. [8] Red ochre contains unhydrated hematite, whereas yellow ochre contains hydrated hematite (Fe 2 O 3 · H 2 O). The principal use of ochre is for tinting with a permanent color.
Hematite | Properties, Formation, Uses, Occurrence - Geology …
网页2023年9月8日 · Hematite has a chemical formula Fe2O3, indicating that it consists of two iron (Fe) atoms bonded to three oxygen (O) atoms. It has a high iron content and is one of the most abundant iron ores found on Earth. It is often found in sedimentary, metamorphic, and igneous rocks.
Iron (II,III) oxide - Wikipedia
网页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.
Hematite Mineral Data
网页Hematite Mineral Data. General Hematite Information. Chemical Formula: Fe2O3. Composition: Molecular Weight = 159.69 gm. Iron 69.94 % Fe 100.00 % Fe 2 O 3. Oxygen 30.06 % O. ______ ______ 100.00 % 100.00 % = TOTAL OXIDE. Empirical Formula: Fe 3+2 O 3. Environment: Magmatic, hydrothermal, metamorphic and sedimentary. IMA Status:
Reduction of Iron Oxides with Hydrogen—A Review
网页Fe 2 O 3 samples with different porosities. The reduction rate of samples with high porosity (54%) increases with increasing temperature until complete reduction. Less porous and dense samples (35% and 8% porosity) show a minimum in reduction rate at 650 °C due to the formation of a dense iron layer. 28.
Hematite | Fe2O3 | CID 14833 - PubChem
网页Iron ore is a mineral substance which, when heated in the presence of a reductant, will yield metallic iron (Fe). It almost always consists of iron oxides, the primary forms of which are magnetite (Fe3O4) and hematite (Fe2O3). Iron ore is the source of primary iron for the world's iron and steel industries.
12.3: Metals and Ores - Chemistry LibreTexts
网页2022年8月10日 · Figure \(\PageIndex{4}\): A Blast Furnace for Converting Iron Oxides to Iron Metal. (a) The furnace is charged with alternating layers of iron ore (largely Fe2O3) and a mixture of coke (C) and limestone (CaCO3). (b) This blast furnace in Magnitogorsk, Russia, was the largest in the world when it was built in 1931.
Hematite (Fe2O3) - NIST Chemistry WebBook
网页Hematite (Fe2O3) Formula: Fe 2 O 3. Molecular weight: 159.688. CAS Registry Number: 1317-60-8. Information on this page: Condensed phase thermochemistry data. References. Notes. Options:
Iron(III) oxide | Fe2O3 - ChemSpider
网页Iron (III) oxide. Molecular formula: Fe 2 O 3. Average mass: 159.687. Monoisotopic mass: 159.854619. ChemSpider ID: 14147.
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