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structural formula of hematite ore

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  • Hematite: Hematite mineral information and data. - Mindat

    Kidney Ore, A reniform (kidney-shaped) or botryoidal variety of hematite. The internal structure of the kidney-shaped nodules is usually concentric and radiating. Martite, The name given for hematite pseudomorphs after magnetite, formed under conditions of increasing oxygen fugacity. Originally described from Itabira,...

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  • Hematite | mineral | Britannica

    Much hematite occurs in a soft, fine-grained, earthy form called red ochre or ruddle. Intermediate between these types are compact varieties, often with a reniform surface (kidney ore) or a fibrous structure (pencil ore). Red ochre is used as a paint pigment; a purified form, rouge, is used to polish plate glass. Kidney ore, a...

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  • Hematite - Wikipedia

    Hematite, also spelled as haematite, is the mineral form of iron(III) oxide (Fe2O3), one of several iron oxides. It is the oldest known Fe oxide mineral and is widespread in rocks and soils. Hematite crystallizes in the rhombohedral lattice system, and it has the same crystal structure as ilmenite and corundum. Hematite and...

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  • Types of Iron Ore: Hematite vs. Magnetite | Investing News Network

    Jun 14, 2017 ... Did you know that there are different types of iron ore? Iron is most often found in hematite and magnetite ores, though goethite, limonite and siderite ores are also common sources. For investors interested in the iron ore space, it''s useful to know know the facts about hematite and magnetite ores. Both of...

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  • HEMATITE | Fe2O3 - PubChem

    PubChem CID: 14833. Chemical Names: HEMATITE; Raphisiderite; Iron ore; Specularite; Haematite; Oligist More... Molecular Formula: Fe2O3. Molecular Weight: 159.687 g/mol. InChI Key: LIKBJVNGSGBSGK-UHFFFAOYSA-N. Substance Registry: FDA UNII. Safety Summary: Laboratory Chemical Safety Summary (LCSS)...

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  • Hematite: A primary ore of iron and a pigment mineral - Geology

    Hematite is the most important ore of iron and it has been used by people as a pigment for at least 40000 years. Learn about the uses and ... What is Hematite? Hematite is one of the most abundant minerals on Earth''s surface and in the shallow crust. It is an iron oxide with a chemical composition of Fe2O3. It is a common...

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  • Hematite: The mineral hematite information and pictures - Minerals

    Detailed description, properties, and locality information guide about the iron mineral hematite. ... The color of most red and brown rock, such as sandstone, is caused by small amounts of Hematite. It is also be responsible for the red color of many minerals. ... Chemical Formula, Fe2O3. Composition, Iron oxide. May contain...

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  • Characterization of Chemical Composition and Microstructure of ...

    Oct 24, 2012 ... The study aimed at investigating the chemical composition and microstructure of raw iron ore from the deposits in Muko area (south-western Uganda). ... The most commonly used iron-bearing minerals contain iron compounds as follows: hematite, Fe 2O 3 (70% Fe); magnetite, Fe 3O 4 (72.4% Fe) and of...

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  • Hematite Mineral Data

    Blake R L , Hessevick R E , Zoltai T , Finger L W , American Mineralogist , 51 (1966) p.123-129, Refinement of the hematite structure. View Additional jPOWD Structure files for Hematite [1]...

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  • HEMATITE (Iron Oxide) - Amethyst Galleries

    Hematite has several varieties, each with their own unique names. Hematite Rose is a circular arrangement of bladed crystals giving the appearance of the flower of a rose. Tiger Iron is a sedimentary deposit of approximately 2.2 billion years old that consists of alternating layers of silver gray hematite and red jasper, chert...

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