View source for Hapkeite

{{Short description|Silicide mineral}}
{{Infobox mineral
| name        = Hapkeite
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| category    = [[Native element minerals]]
| formula     = Fe<sub>2</sub>Si
| IMAsymbol   = Hpk<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref>
| molweight   = 
| strunz      = 1.BB.35
| system      = [[Cubic crystal system|Isometric]] 
| class       = Hexoctahedral (m{{overline|3}}m) <br/>[[H-M symbol]]: (4/m {{overline|3}} 2/m) 
| symmetry    = ''P''m{{overline|3}}m
| unit cell   = a = 2.831&nbsp;Å; Z&nbsp;=&nbsp;1
| color       = silvery, with a slight tarnish
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| luster      = metallic
| streak      = 
| diaphaneity = opaque
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| references  = <ref>{{Cite web|url = http://www.lpi.usra.edu/meetings/lpsc2003/pdf/1818.pdf|title = Lunar and Planetary Science XXXIV|date = 2003|accessdate = |website = |publisher = |last = Anand|first = M}}</ref><ref name=Mindat>[http://www.mindat.org/min-26419.html Mindat]</ref><ref name=Webmin>[http://webmineral.com/data/Hapkeite.shtml Webmineral data]</ref>
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'''Hapkeite''' is a [[mineral]] discovered in the [[Dhofar 280]] [[meteorite]] found in 2000 in [[Oman]] on the [[Arabian Peninsula]]. The meteorite is believed to originate from the [[Moon]]; specifically, it appears to be a fragment of lunar highland [[breccia]]. Hapkeite's composition is of [[silicon]] and [[iron]], and it is similar to other silicon-iron minerals found on [[Earth]]. An impact on the Moon is thought to have launched the partially molten or vaporized material into orbit.

Due to its 1:2 composition of silicon-iron, hapkeite was given the [[chemical formula]] [[Iron|Fe]]<sub>2</sub>[[Silicon|Si]]. It occurs as opaque, yellowish to silvery microscopic [[Cubic (crystal system)|isometric]] crystals.

It is named after [[Bruce Hapke]], who predicted the presence and importance of vapor-deposited coatings on lunar soil grains ([[space weathering]]).<ref name=Webmin/>

Beside hapkeite, other natural iron silicide minerals include [[gupeiite]], [[naqite]], [[linzhiite]], [[luobusaite]], [[suessite]], [[xifengite]], and [[zangboite]].<ref name=Mindat />

==See also==
* [[Glossary of meteoritics]]
*[[List of minerals]]
*[[List of minerals named after people]]

==References==
{{Reflist}}
*[http://www.pnas.org/cgi/content/abstract/101/18/6847?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=Hapkeite&searchid=1134505993735_20542&stored_search=&FIRSTINDEX=0&journalcode=pnas Space weathering on airless planetary bodies: Clues from the lunar mineral hapkeite 2004 PNAS]

{{Meteorites}}

[[Category:Iron(II) minerals]]
[[Category:Meteorite minerals]]
[[Category:Cubic minerals]]
[[Category:Minerals in space group 221]]
[[Category:Native element minerals]]