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* [[풍화작용]]에 강하였다.
* [[대기권]]에서 살아남았다. 그리하여 큰 조각으로 발견될 확률이 높다.
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In fact, Iron meteorites account for almost 90% of the mass of all known meteorites, about 500 tons. All the largest known meteorites are of this type <sup>[http://www.meteorite.fr/en/basics/charts.htm]</sup>, including the largest -- the [[Hoba meteorite]].
{{토막글}}
==Origin==
Iron meteorites have been linked to [[M-type asteroid]]s since both types of objects have similar spectral characteristics in the visible and near-infrared wavelength regions. Iron meteorites are thought to be the fragments of the cores of larger ancient [[asteroid]]s that have been shattered by impacts. The [[IIE iron meteorite|IIE chemical class]] may be a notable exception, in that they probably originate from the crust of [[S-type asteroid]] [[6 Hebe]].
Chemical and isotope analysis indicates that at least about 50 distinct parent bodies were involved. This implies that there were once at least this many large, [[planetary differentiation|differentiated]], asteroids in the asteroid belt - many more than today.
==Composition==
The overwhelming bulk of these meteorites consists of the alloys [[kamacite]] and [[taenite]]. Minor minerals, when occurring, often form rounded nodules of [[troilite]] or [[graphite]], surrounded by [[schreibersite]] and [[cohenite]].
==Use==
The iron nickel alloy was used by several cultures for the manufacturing of tools and weapons. For example the [[Inuit]] used parts of the [[Cape York meteorite]].<ref>{{cite journal|
| author =T. A. Rickard
| title = The Use of Meteoric Iron
| journal =The Journal of the Royal Anthropological Institute of Great Britain and Ireland
|volume = 71
| issue = 1/2
| year = 1941
| pages = 55-66.
| url = http://links.jstor.org/sici?sici=0307-3114%281941%2971%3A1%2F2%3C55%3ATUOMI%3E2.0.CO%3B2-8}}</ref><ref>{{cite journal|
| author = Buchwald, V F
| title = On the Use of Iron by the Eskimos in Greenland
| journal = Materials Characterization
| volume = 29
| issue = 2
| year = 1992
| pages = 139-176
| url = http://links.jstor.org/sici?sici=0307-3114%281941%2971%3A1%2F2%3C55%3ATUOMI%3E2.0.CO%3B2-8}}</ref>
==Classification==
Two classifications are in use.
The older '''Structural classification''' is based on the relative abundance of [[nickel]] to [[iron]], which can be assessed from the appearance of polished cross-sections that have been etched with acid.
<sup>[http://www.meteorite.fr/en/classification/ironmain.htm#rel]</sup> The categories are:
* [[Hexahedrite]]s (low nickel)
* [[Octahedrite]]s (average to high nickel), most common
* [[Ataxite]]s (very high nickel), rare
The [[Octahedrite]]s can be further divided up on the basis of the properties of their [[Widmanstätten pattern]]s.
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