{{Short description|Nitride mineral}} {{Infobox mineral | name = Roaldite | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | category = | formula = {{chem2|(Fe,Ni)>4N}} | IMAsymbol = Roa<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.BC.05 | dana = 1.1.18.2 | system = Cubic | class = Hextetrahedral ({{overline|4}}3m) <br/>H–M Symbol: ({{overline|4}} 3m) | symmetry = ''P{{overline|4}}3m'' (no. 215) | unit cell = a = 3.79&nbsp;Å; Z&nbsp;=&nbsp;1 | color = | colour = Tin-white | habit = Platelets in kamacite | twinning = | cleavage = | fracture = | tenacity = | mohs = 5.5-6.5 | lustre = Metallic | streak = | diaphaneity = Opaque | gravity = 7.21 | density = | polish = | opticalprop = Isotropic | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = <ref name=Mindat>[http://www.mindat.org/show.php?id=3430 Mindat.org]</ref><ref name=Webmin>[http://www.webmineral.com/data/Roaldite.shtml Webmineral data]</ref> }}

'''Roaldite''' is a rare meteorite mineral containing iron, nickel and nitrogen. Its chemical formula is {{chem2|(Fe,Ni)4N}}.

It was first described in 1981 for an occurrence in the Youngedin meteorite, Avon, Western Australia. It was named after Roald Norbach Nielsen (born 1928), a Danish expert in electron microprobe. The mineral has also been reported from the Jerslev meteorite, Sjaelland, Denmark, and the Canyon Diablo meteorite of Meteor Crater in Arizona.<ref name=Mindat/>

==See also== * Glossary of meteoritics ==References== {{Reflist}}

{{Meteorites}}

Category:Iron minerals Category:Nickel minerals Category:Native element minerals Category:Meteorite minerals Category:Cubic minerals Category:Minerals in space group 215

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