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Qu'est-ce (qui) est pyrite$65875$ - définition
![NiAs structure]] of basic pyrrhotite-1C.](https://commons.wikimedia.org/wiki/Special:FilePath/Iron(II)-sulfide-unit-cell-3D-balls.png?width=200 "NiAs structure]] of basic pyrrhotite-1C.")
.jpg?width=200 "Microscopic image of Pyrrhotite under reflected light")
 2 (18275905364).jpg?width=200 "Flickr</nowiki>")
![[[Pyritohedron]]-shaped crystals from Italy](https://commons.wikimedia.org/wiki/Special:FilePath/Pyrite elbe.jpg?width=200 "[[Pyritohedron]]-shaped crystals from Italy")
![An abandoned pyrite mine near [[Pernek]] in [[Slovakia]]](https://commons.wikimedia.org/wiki/Special:FilePath/Stolna pri Perneku.jpg?width=200 "An abandoned pyrite mine near [[Pernek]] in [[Slovakia]]")
![As a replacement mineral in an [[ammonite]] from France](https://commons.wikimedia.org/wiki/Special:FilePath/Bullypyrite2.jpg?width=200 "As a replacement mineral in an [[ammonite]] from France")
![Paraspirifer bownockeri]]'' in pyrite](https://commons.wikimedia.org/wiki/Special:FilePath/Paraspirifer bownockeri.fond.jpg?width=200 "Paraspirifer bownockeri]]'' in pyrite")
Wikipédia
Pyrrhotite (pyrrhos in Greek meaning "flame-coloured") is an iron sulfide mineral with the formula Fe(1-x)S (x = 0 to 0.2). It is a nonstoichiometric variant of FeS, the mineral known as troilite. Pyrrhotite is also called magnetic pyrite, because the color is similar to pyrite and it is weakly magnetic. The magnetism decreases as the iron content decreases, and troilite is non-magnetic. Pyrrhotite is generally tabular and brassy/bronze in color with a metallic luster. The mineral occurs with mafic igneous rocks like norites, and may form from pyrite during metamorphic processes. Pyrrhottie is associated and mined with other sulfide minerals like pentlandite, pyrite, chalcopyrite, and magnetite, and has been found globally.
