Pyrrhotite
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Pyrrhotite - Wikipedia
WEBpyrrhotite (pyrrhos in Greek meaning "flame-coloured") is an iron sulfide mineral with the formula Fe (1-x) S (x = 0 to 0.125). It is a nonstoichiometric variant of FeS, the mineral known as troilite. pyrrhotite is also called magnetic pyrite, because the color is …
En.wikipedia.orgQu'est-ce que la pyrrhotite ? | Ce qu'il faut comprendre | ACQC
WEBLa pyrrhotite est une espèce minérale composée de sulfure de fer qui s'oxyde au contact de l’air et de l’humidité. Le minéral produit alors de l’acide sulfurique qui réagit avec le calcium et les aluminates du béton. La réaction entraine alors la fissuration et la désagrégation la fondation.
Acqc.caPyrrhotite: Physical properties, uses, composition - Geology.com
WEBpyrrhotite is an iron sulfide mineral with magnetic properties that make it easy to identify. It is sometimes a minor ore of nickel. Specimens with well-formed crystals are popular with collectors.
Geology.comUSGS Publishes Map of Potential Pyrrhotite Occurrences
WEBApr 29, 2020 · pyrrhotite, a mineral of concern for the construction industry, consists of iron and sulfur, and when exposed to water and air, it can break down to form secondary minerals that expand and crack concrete, causing concrete structures, like home foundations, to fail.
Usgs.govPyrrhotite: Mineral information, data and localities. - mindat.org
WEBColour: Bronze brown, bronze red, or dark brown. Lustre: Metallic. Hardness: 3½ - 4. Specific Gravity: 4.58 - 4.65. Crystal System: Monoclinic. Member of: pyrrhotite Group. Name: Named in 1847 by Ours-Pierre-Armand Petit-Dufrénoy from Greek πνρρός "pyrrhos", flame-colored.
Mindat.orgPyrrhotite Mineral Data
WEBpyrrhotite. Comments: Lustrous sharp crystals of pyrrhotite to 3.5 cm in size with minor sphalerite and chalcopyrite. Location: Nikolaevskiy mine, Dal'negors, Primorskiy Kray, Russia. Scale: 4 x 5 x 5.5 cm. © Dan Weinrich
Webmineral.comPyrrhotite: The mineral pyrrhotite information and pictures
WEBDetailed description, properties, and locality information guide about the mineral pyrrhotite.
Minerals.netPyrrhotite | Magnetic Properties, Iron Sulfide, Crystal Structure
WEBpyrrhotite, iron sulfide mineral (Fe1–xS) in the niccolite group; in it, the ratio of iron to sulfur atoms is variable but is usually slightly less than one.
Britannica.comPyrrhotite - an overview | ScienceDirect Topics
WEBpyrrhotite (Fig. 1.11) is an unusual iron sulfide with variable iron content [Fe (1−x) S (x=0–0.2)]. The color ranges between bronze yellow and copper-red with black streak and metallic luster. The hardness varies between 3.5 and 4.5 on the Mohs scale and an average specific gravity of 4.6.
Sciencedirect.comPyrrhotite | Encyclopedia.com
WEBMay 8, 2018 · pyrrhotite Mineral, FeS; sp. gr. 4.6–4.7; hardness 3.5–4.5; hexagonal; bronzeyellow but darkens rapidly to reddishbrown on exposure; greyish-black streak; metallic lustre; crystals rare, and can be platy or tabular, but the mineral is usually massive or granular; no cleavage; magnetic; occurs in igneous rocks, e.g. gabbro or norite, as
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