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pyrrhotite    
磁黄铁矿

磁黄铁矿

pyrrhotite
n 1: a brownish iron sulfide mineral (FeS) having weak magnetic
properties [synonym: {pyrrhotite}, {pyrrhotine}, {magnetic
pyrites}]


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  • Pyrrhotite - Wikipedia
    Pyrrhotite exists as a number of polytypes of hexagonal or monoclinic crystal symmetry; several polytypes often occur within the same specimen Their structure is based on the NiAs unit cell
  • Pyrrhotite and Crumbling Concrete - CT. gov
    Pyrrhotite weathering in the presence of moisture and air produces secondary minerals that expand, causing concrete to crack This compromises the structural integrity and accelerates degradation with the increased infiltration of water and air
  • Pyrrhotite: Physical properties, uses, composition - Geology. com
    Pyrrhotite is an iron sulfide mineral found in igneous and metamorphic rocks Its chemical formula of Fe (1-x) S indicates that it is deficient in iron - which causes pyrrhotite to be slightly to strongly magnetic
  • Pyrrhotite and Crumbling Foundations - UMass Amherst
    What is Pyrrhotite? Pyrrhotite is a naturally occurring iron sulfide (FeS) mineral that can be found in igneous and metamorphic rocks The mineral can be identified by its metallic bronze luster and its similar appearance to pyrite (fool's gold), another iron sulfide mineral [2]
  • Pyrrhotite: Mineral information, data and localities.
    Pyrrhotite is found with pentlandite in basic igneous rocks, veins, and metamorphic rocks It is also often found with pyrite, marcasite, and magnetite It has varying magnetic powers, depending on the number of Fe vacancies in the crystal structure
  • USGS Publishes Map of Potential Pyrrhotite Occurrences
    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
  • How do pyrite and pyrrhotite damage building foundations?
    Pyrite and pyrrhotite are minerals known as iron sulfides When iron sulfides are exposed to water and oxygen, a series of chemical reactions breaks down the iron sulfides and forms new minerals called sulfates
  • Pyrrhotite | Magnetic Properties, Iron Sulfide, Crystal Structure . . .
    It commonly is found with pentlandite and other sulfides in silica-poor igneous rocks, as at Kongsberg, Nor ; Andreas-Berg, Ger ; Trentino, Italy; and Sudbury, Ont The variety troilite, with a composition near that of iron sulfide (FeS), is an important constituent of some meteorites
  • Pyrrhotite: The mineral pyrrhotite information and pictures
    Detailed description, properties, and locality information guide about the mineral pyrrhotite
  • Pyrrhotite Mineral Data
    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





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