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magnétite - traduction vers français
![Magnetite and other heavy minerals (dark) in a quartz [[beach]] [[sand]] ([[Chennai]], [[India]]).](https://commons.wikimedia.org/wiki/Special:FilePath/HeavyMineralsBeachSand.jpg?width=200 "Magnetite and other heavy minerals (dark) in a quartz [[beach]] [[sand]] ([[Chennai]], [[India]]).")
![Octahedral crystals of magnetite up to 1.8 cm across, on cream colored [[feldspar]] crystals, locality: Cerro Huañaquino, [[Potosí Department]], [[Bolivia]]](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetite-278427.jpg?width=200 "Octahedral crystals of magnetite up to 1.8 cm across, on cream colored [[feldspar]] crystals, locality: Cerro Huañaquino, [[Potosí Department]], [[Bolivia]]")
![Magnetite crystals with [[epitaxial]] elevations on their faces](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetite-170591.jpg?width=200 "Magnetite crystals with [[epitaxial]] elevations on their faces")
![Magnetite in contrasting [[chalcopyrite]] matrix](https://commons.wikimedia.org/wiki/Special:FilePath/Chalcopyrite-Magnetite-cktsr-10c.jpg?width=200 "Magnetite in contrasting [[chalcopyrite]] matrix")
![Magnetite with a rare cubic habit from [[St. Lawrence County, New York]]](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetite-rw16b.jpg?width=200 "Magnetite with a rare cubic habit from [[St. Lawrence County, New York]]")
Définition
Wikipédia
Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+2O4. It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. With the exception of extremely rare native iron deposits, it is the most magnetic of all the naturally occurring minerals on Earth. Naturally magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, which is how ancient peoples first discovered the property of magnetism.
Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and leaves a black streak. Small grains of magnetite are very common in igneous and metamorphic rocks.
The chemical IUPAC name is iron(II,III) oxide and the common chemical name is ferrous-ferric oxide.
