http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Neumann_linesNeumann lines - Revision history2026-05-14T05:48:49ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=Neumann_lines&diff=2204576&oldid=prev84.251.207.6: ce2024-11-26T13:02:22Z<p>ce</p>
<p><b>New page</b></p><div>{{Short description|Patterns of parallel lines seen in cross-sections of many hexahedrite iron meteorites}}<br />
[[File:Sikhote alin.jpg|thumb|200px|Neumann lines{{clarify|date=October 2019}} in an iron meteorite]]<br />
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'''Neumann lines''', or '''Neumann bands''', are fine patterns of parallel lines seen in cross-sections of many [[hexahedrite]] [[iron meteorite]]s in the kamacite phase, although they may appear also in octahedrites provided the kamacite phase is about 30 micrometres wide. They can be seen after a polished meteorite cross-section is treated with acid. The lines are indicative of a shock-induced deformation of the [[kamacite]] crystal, and are thought to be due to impact events on the [[parent body]] of the [[meteorite]].<ref>O. Richard Norton, Rocks from Space, Mountain Press Pub., 1998, {{ISBN|978-0-87842-373-6}}, page 195.</ref> <br />
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[[File:Guide leaflet (1901) (14581444378).jpg|left|thumb|Iron meteorite showing relatively homegenous crystal formation with hexadedrite lamellae line, 1901]]<br />
Neumann lines are named after {{Ill|Johann Georg Neumann (politician)|lt=Johann Georg Neumann|de|Johann Georg Neumann (Politiker)}} who discovered them in 1848 in the hexahedrite meteorite which had fallen near [[Broumov|Braunau]] (present-day Broumov, [[Czech Republic]]) in 1847.<ref>{{Cite journal |last=Neumann |first=Johann G. |date=1849 |title=Ueber die krystallinische Struktur des Meteoreisens von Braunau |url=https://www.google.fr/books/edition/Naturwissenschaftliche_Abhandlungen/6mM_AAAAcAAJ?hl=en&gbpv=1&dq=neumann&pg=RA1-PA45&printsec=frontcover |journal=Naturwissenschaftliche Abhandlungen Wien |location=Wien |volume=3 |pages=45-56}}</ref><ref>J. G. Burke: Cosmic Debris, Meteorites in History. University of California Press, 1986.</ref><br />
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==See also==<br />
* [[Glossary of meteoritics]]<br />
*[[Widmanstätten pattern]]<br />
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==References==<br />
{{Reflist}}<br />
<!-- *[http://www.meteorite.fr/en/classification/ironmain.htm#strucclass www.meteorite.fr] --><br />
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{{Meteorites}}<br />
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[[Category:Meteorite mineralogy and petrology]]</div>84.251.207.6