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Topic: Kamacite

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	Meteorite Minerals
		Kamacite may have Neumann bands--lines that are created when meteorites are shocked.
		Sometimes on polished surfaces, kamacite may be distinguished from taenite because it is not as hard.
		Plessite--this is not a mineral, but is a mixture of fine-grained kamacite and taenite.
	www.alaska.net /~meteor/mineral.htm (801 words)

	PSF: What is a Meteorite?
		Iron meteorites are characterized by the presence of two nickel-iron alloy metals: kamacite and taenite.
		Octahedrites, which are the most common type of iron meteorite, exhibit a unique structural feature called the Widmanstatten pattern when etched with a weak acid.
		This unique crystal pattern is the result of the combination of the two nickel-iron minerals kamacite and taenite being present in approximately equal amounts.
	www.bccmeteorites.com /met.htm (1133 words)

	meteorite minerals
		Kamacite- -this is essentially metallic iron with up to 7.5% nickel in solid solution.
		Plessite- -this is not a mineral, but is a mixture of fine-grained kamacite and taenite.
		Chromite --FeCrO4--This ore of chrome is common on earth and as a trace mineral in iron meteorites.
	earthsci.org /fossils/space/craters/met/mineral.htm (1051 words)

	st robert poster.doc
		The ubiquitous matrix kamacite grains exhibit consistently zoned edges, with the Ni content increasing from 4.4 at the rim to 6.5 - 7 % in the centres of these grains.
		This compositional variation is consistent in all kamacite grains and probably represents re-equilibration during cooling from peak temperatures.
		The core zone is composed of taenite grains (tetrataenite?) with an average composition of ~ 55 wt % Ni surrounded by kamacite of an average composition of 4.2 wt % Ni.
	castaing.eps.mcgill.ca /meteoriteposter/poster.html (1399 words)

	Meteorite.fr - Classification - Iron Meteorites - Main
		The octahedrites are further divided into several subgroups based on the width of their kamacite lamellae, and each subgroup is associated with a particular chemical class of iron meteorites (see table below).
		Hexahedrites consist primarily of kamacite, and they are named for the way that the crystal structure of kamacite is arranged according to the spatial form of a hexahedron.
		These lines represent a shock-induced, structural deformation of the kamacite plates, and they suggest an impact history for the hexahedrite parent body, at least for the hexahedrites related to chemical group IAB (see table below).
	www.meteorite.ch /en/classification/ironmain.htm (847 words)

	Kamacite
		kamacite meteoritic mineral consisting of iron alloyed with 5 to 7 percent nickel.
		It is found in iron meteorites and comprises all the metal in hexahedrites; it also is a principal constituent of the octahedrites, where it is intergrown with...
		The taenite interior is tetrataenite + kamacite plessite.
	www.toprocks.net /MineralList/46/Kamacite.asp (546 words)

	Kamacite
		It was first named in 1861 from the Greek kamask (lath or beam).
		Meteoric kamacite is found in bands in octahedrites or hexahedrites, these sometimes contains Neumann[?] bands, evidence of impact, or Widmanstätten's patterns.
		It is difficult to distinguish visually from the similar meteor alloy taenite and the two can be found closely intermixed as plessite.
	www.ebroadcast.com.au /lookup/encyclopedia/ka/Kamacite.html (116 words)

	Iron Meteorites
		Depending on the occurrence and the distribution of these nickel-iron alloys, etched iron meteorites display characteristic structures that are used to classify iron meteorites into octahedrites, hexahedrites, and ataxites.
		Spaces between larger kamacite and taenite plates are often filled by a fine-grained mixture of kamacite and taenite called plessite, for the Greek word for “filling”.
		Ataxites consist primarily of nickel-rich taenite, and kamacite is found only in the form of microscopic lamellae and spindles.
	www.meteorites.tv /contents/en-us/d164.html (1145 words)

	Meteorite.fr - Classification - Iron Meteorites - Main
		The octahedrites are further divided into several subgroups based on the width of their kamacite lamellae, and each subgroup is associated with a particular chemical class of iron meteorites (see table below).
		Hexahedrites consist primarily of kamacite, and they are named for the way that the crystal structure of kamacite is arranged according to the spatial form of a hexahedron.
		These lines represent a shock-induced, structural deformation of the kamacite plates, and they suggest an impact history for the hexahedrite parent body, at least for the hexahedrites related to chemical group IAB (see table below).
	www.meteorite.fr /en/classification/ironmain.htm (847 words)

	The Meteorite Catalogue Database at the Natural History Museum (Site not responding. Last check: )
		The mineralogy of iron meteorites is dominantly an intergrowth of two phases, the iron-nickel alloys kamacite and taenite.
		Laths of kamacite intergrown with Ni-rich phases form the Widmansttten pattern revealed in polished and etched iron meteorites.
		The width of the kamacite lamellae allows classification of iron meteorites into 5 structural groups: the coarsest, coarse, medium, fine and finest octahedrites.
	www.nhm.ac.uk /jdsml/research-curation/projects/metcat/bgiron.dsml (263 words)

	Michael I. Casper's Meteorites Inc. Meteorites for Sale (Site not responding. Last check: )
		Kamacite and taenite are both Fe-Ni alloys, but they differ by the relative amounts of iron and nickel, and (consequently) have a different crystal structure; kamacite forms a body-centered cubic lattice whereas taenite forms a face-centered one.
		Neumann lines are formed by shock deformation of the metallic kamacite crystals during violent impacts.
		This kamacite is surrounded by fine sheets of taenite, while the interslices between the bands are made of plessite, a combination of kamacite and taenite.
	www.caspermeteorites.com /irons.html (365 words)

	Yafa H5 ordinary chondrite meteorite, Yemen (Site not responding. Last check: )
		Metal phases in the Yafa chondrite are dominated by kamacite (white, highly reflective Ni-Fe alloy with 6-7 weight percent Ni) plus troilite (yellowish FeS, seen in the corner of this view).
		The Ni-rich phase tetrataenite (NiFe) is visible as a small, highly-reflective cream-coloured grain on one extremity of the main kamacite mass (upper left quadrant of photo).
		A small grain of grey chromite is visible in the silicate groundmass, near the edge of the kamacite.
	www.physics.utoronto.ca /~isotrace/yafapix2.htm (333 words)

	Taenite - complete list of mineral names
		kamacite may be distinguished from taenite because it is not as hard...
		The taenite interior is martensite or taenite + kamacite plessite...
		Instrumental neutron activation analysis (INAA) was used to determine Ni, Co, Cu, Ga, As, Au, W, Re and Ir in taenite lamellae isolated by acid dissolution from eight iron meteorites from groups IA, IIIAB and IVA.^Taenite is enriched in Ni, Cu,...
	www.absoluterocknet.com /complete_list_of_mineral_and_crystal_names/Taenite.asp (518 words)

	Octahedrite Information
		They are composed primarily of the nickel-iron alloys: taenite - high nickel content, and kamacite - low nickel content.
		When polished and acid etched the classic Widmanstätten patterns of intersecting lines of lamellar kamacite, are visible.
		In gaps between the kamacite and taenite lamellae, a fine-granied mixture called plessite is often found.
	www.bookrags.com /wiki/Octahedrite (155 words)

	Dog Names: Kamacite
		Kamacite falls into the 'Seven' group of dog names for soul urge or inner desire expressions.
		What 'Seven' dog names like Kamacite want most is to find a nice secluded spot, relax, and let their minds wander in order to ponder life's riddles or simply just daydream.
		The 'thinkers' of the dog world, sitting by themselves thinking the day away is as good a treat as a tasty biscuit. The positive traits of 'Seven' dog names like Kamacite is that they tend to be very even-tempered and are incredibly fast learners.
	www.dogsabc.com /k_dog_names/dog-names-kamacite.html (261 words)

	Untitled Document
		Further analyses of trace elements (Ge, Ga, Ir) is being conducted to determine the exact classification and also to determine whether this sample is related to an octahedrite (Dungannon) previously reported from Virginia.
		The Widmanstätten pattern, which is a pattern produced between the kamacite and taenite interface, confirms this is a meteorite.
		The band-width of the kamacite within the Widmanstätten pattern (average > 2 mm), and the content of Ni around 6.7%, indicates that this is a coarse octahedrite.
	www.marshall.edu /mbic/example/exProjtwelve.html (954 words)

	Kamacite
		In the octahedrites it is found in bands interleaving with taenite forming WidmanstÃ¤tten patterns.
		In hexahedrites, fine parallel lines called Neumann lines are often seen, which are evidence for structural deformation of adjacent kamacite plates due to shock from impacts.
		At times kamacite can be found so closely intermixed with taenite that it is difficult to distinguish them visually, forming plessite.
	www.kiwipedia.com /kamacite.html (168 words)

	Meteorites - Chile and Texas
		The kamacite lamellae are fairly straight and some extend, with interruptions, for as much as 10 cm.
		The width of the kamacite lamellae classify this iron also as a coarse octahedrite.
		The kamacite plates are closely spaced with a minute amount of taenite separating the lamellae.
	www.minsocam.org /msa/collectors_corner/arc/meteorite.htm (860 words)

	meteorite minerals
		Kamacite- -this is essentially metallic iron with up to 7.5% nickel in solid solution.
		Plessite- -this is not a mineral, but is a mixture of fine-grained kamacite and taenite.
		Chromite --FeCrO4--This ore of chrome is common on earth and as a trace mineral in iron meteorites.
	www.earthsci.org /fossils/space/craters/met/mineral.htm (1051 words)

	Achi-Ido ordinary chondrite meteorite, Nigeria [total: 945 kb]
		In terms of classification, the petrologic class (L) was determined by electron microprobe analysis of mineral chemistry (olivine, orthopyroxene and kamacite compositions), a result consistent with overall metal content, and further confirmed by bulk chemical analysis.
		Almost indistinguishable from the kamacite in this photograph is a small amount of Ni-rich taenite- tetrataenite, at the far left end of the mass and in the core of the mass, halfway from the troilite bleb to the lower right end.
		This one is rimmed by troilite grains, with a "cap" of kamacite on one side.
	www.physics.utoronto.ca /~isotrace/aapix.htm (519 words)

	Meteorites: The Meteorite Classification System
		Kamacite and taenite are present and the nickel content can exceed 20%.
		This group is subdivided based on the band-width of their kamacite lamellae.
		Finest kamacite lamellae sized at less than 0.2mm.
	www.astrodigital.org /astronomy/metcat.html (662 words)

	[No title]
		The two main minerals in iron meteorites are the iron-nickel alloys kamacite (iron and low-Ni) and taenite (iron and high-Ni), and three classes of iron meteorite are based on the relative abundance of these minerals.
		They are dominated by kamacite, taenite and olivine with other trace minerals, and may well represent mantle rocks from its parent body or bodies.
		Both kamacite and taenite are present, carbon and water concentrations are decreasing.
	zuserver2.star.ucl.ac.uk /~skd/10Asteroids.doc (2574 words)

	[No title]
		Kamacite- Is essentially metallic iron with up to 7.5% nickel in solid solution.
		Sometimes troilite occurs as plates parallel to the cubic structure of the cubic taenite structure of iron meteorites.
		Daubreelite--FeCr2S4--This iron chrome sulfide is found as exsolution lamellae in troilite nodules or as particles in kamacite.
	members.tripod.com /~mrd432/www/index3.html (935 words)

	Kamacite Information Center - kamacite
		It is formula for kamacite a naturally occurring alloy of iron and nickel, usually in the proportion of 90:10 to 95:5 although impurities such as cobalt or carbon may be present.
		It has a metallic lustre, is grey and has no clear cleavage although the structure is isometric-hexoctahedral.
		Meteoric kamacite is found in bands in octahedrites or kamacite hexahedrites, these sometimes contains Neumann bands, evidence of impact, or Widmanstätten's patterns.
	www.scipeeps.com /Sci-Chemistry_Topics_J_-_Le/Kamacite.html (134 words)

	Octahedrite (Site not responding. Last check: )
		Typically composed of the alloys of nickel-iron: taenite - nickel-iron with high nickel content and Kamacite - nickel-iron with low nickel content.
		A iron nickel phosphide, Schreibersite, is present in some nickel-iron meteorites as well as an iron nickel Cobalt Carbide, cohenite.
		Octahedrite is also an obsolete synonym for Anatase, one of the three known titanium dioxide minerals.
	www.ufaqs.com /wiki/en/oc/Octahedrite.htm (103 words)

	NationMaster - Encyclopedia: Kamacite
		Franz Ernst Neumann (September 11, 1798 - May 23, 1895) was a German mineralogist, physicist and mathematician.
		Kamacite contains 4 to 7.5% nickel, and it forms large crystals that appear like broad bands or beam-like structures on the etched surface of an iron meteorite.
		Pure kamacite forms cubic crystals with six equal sides at right angles to each other, and hexahedrites are actually large, cubic kamacite crystals.
	www.nationmaster.com /encyclopedia/Kamacite (465 words)

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