roaldite

{{Infobox mineral

| name = Roaldite

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| formula = {{chem2|(Fe,Ni)>4N}}

| IMAsymbol = Roa{{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}}

| molweight =

| strunz = 1.BC.05

| dana = 1.1.18.2

| system = Cubic

| class = Hextetrahedral ({{overline|4}}3m)
H–M Symbol: ({{overline|4}} 3m)

| symmetry = P{{overline|4}}3m (no. 215)

| unit cell = a = 3.79 Å; Z = 1

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| colour = Tin-white

| habit = Platelets in kamacite

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| mohs = 5.5-6.5

| lustre = Metallic

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| diaphaneity = Opaque

| gravity = 7.21

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| opticalprop = Isotropic

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| references = [http://www.mindat.org/show.php?id=3430 Mindat.org][http://www.webmineral.com/data/Roaldite.shtml Webmineral data]

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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.