Taenite is a mineral found naturally on Earth mostly in iron meteorites. It is an alloy of iron and nickel, with a chemical formula of Fe,Ni and nickel proportions of 20% up to 65%.
Widmanstätten pattern showing the two forms of Nickel-Iron, Kamacite and Taenite, in an octahedrite meteorite
The name is derived from the Greek ταινία for "band, ribbon". Taenite is a major constituent of iron meteorites. In octahedrites it is found in bands interleaving with kamacite forming Widmanstätten patterns, whereas in ataxites it is the dominant constituent. In octahedrites a fine intermixture with kamacite can occur, which is called plessite.
Taenite is one of four known Fe-Ni meteorite minerals: The others are kamacite, tetrataenite, and antitaenite.
It is opaque with a metallic grayish to white color. The structure is isometric-hexoctahedral (cubic). Its density is around 8 g/cm3 and hardness is 5 to 5.5 on the Mohs scale. Taenite is magnetic, in contrast to antitaenite. The structure is isometric-hexoctahedral (cubic). The crystal lattice has the c≈a=3.582±0.002 Å.[4] The Strunz classification is I/A.08-20, while the Dana classification is 1.1.11.2.
^Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (2005). "Taenite" (PDF). Handbook of Mineralogy. Mineral Data Publishing. Retrieved 14 March 2022.
^Albertsen, F.; Knudsen, J. M.; Jensen, G. B. (Jun 1978). "Structure of taenite in two iron meteorites J.". Nature. 273 (5662): 453–454. Bibcode:1978Natur.273..453A. doi:10.1038/273453a0. S2CID 4177830.
Mason B., 1962: Meteorites. J. Wiley & Sons, New York[ISBN missing]
December 01, 2023
taenite, mineral, found, naturally, earth, mostly, iron, meteorites, alloy, iron, nickel, with, chemical, formula, nickel, proportions, widmanstätten, patterns, kamacite, from, meteorite, currently, natural, history, museum, london, generalcategorymetals, inte. Taenite is a mineral found naturally on Earth mostly in iron meteorites It is an alloy of iron and nickel with a chemical formula of Fe Ni and nickel proportions of 20 up to 65 TaeniteWidmanstatten patterns of Kamacite and Taenite from a meteorite currently in the Natural History Museum London GeneralCategoryMetals and intermetallic alloysFormula repeating unit g Ni Fe IMA symbolTae 1 Strunz classification1 AE 10Crystal systemIsometricCrystal classHexoctahedral m3 m H M symbol 4 m 3 2 m Space groupFm3mIdentificationColormetallic grayish to whiteCleavageNoneFractureHackly fractureTenacityMalleable flexibleMohs scale hardness5 5 5LustermetallicStreaklight grayDiaphaneityOpaqueSpecific gravity7 8 8 22Other characteristicsmagnetic not radioactiveReferences 2 3 Widmanstatten pattern showing the two forms of Nickel Iron Kamacite and Taenite in an octahedrite meteoriteThe name is derived from the Greek tainia for band ribbon Taenite is a major constituent of iron meteorites In octahedrites it is found in bands interleaving with kamacite forming Widmanstatten patterns whereas in ataxites it is the dominant constituent In octahedrites a fine intermixture with kamacite can occur which is called plessite Taenite is one of four known Fe Ni meteorite minerals The others are kamacite tetrataenite and antitaenite Contents 1 Properties 2 Meteorite localities with taenite 3 See also 4 ReferencesProperties editIt is opaque with a metallic grayish to white color The structure is isometric hexoctahedral cubic Its density is around 8 g cm3 and hardness is 5 to 5 5 on the Mohs scale Taenite is magnetic in contrast to antitaenite The structure is isometric hexoctahedral cubic The crystal lattice has the c a 3 582 0 002 A 4 The Strunz classification is I A 08 20 while the Dana classification is 1 1 11 2 Meteorite localities with taenite editCampo del Cielo strewn field in Argentina Henbury Meteorites Conservation Reserve in Australia Canyon Diablo in Arizona See also editGlossary of meteoritics List of mineralsReferences edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 Anthony John W Bideaux Richard A Bladh Kenneth W Nichols Monte C 2005 Taenite PDF Handbook of Mineralogy Mineral Data Publishing Retrieved 14 March 2022 http webmineral com data Taenite shtml Archived 2021 01 22 at the Wayback Machine Webmineral data Albertsen F Knudsen J M Jensen G B Jun 1978 Structure of taenite in two iron meteorites J Nature 273 5662 453 454 Bibcode 1978Natur 273 453A doi 10 1038 273453a0 S2CID 4177830 Mason B 1962 Meteorites J Wiley amp Sons New York ISBN missing Retrieved from https en wikipedia org w index php title Taenite amp oldid 1172798023, wikipedia, wiki, book, books, library,
