niningerite

{{Infobox mineral

| name = Niningerite

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| category = Sulfide minerals

| formula = MgS

| IMAsymbol = Nng{{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 = 2.CD.10

| system = Cubic

| class = Hexoctahedral (m{{overline|3}}m)
H-M symbol: (4/m {{overline|3}} 2/m)

| symmetry = Fm{{overline|3}}m

| unit cell = a = 5.2 Å; Z = 4

| color = grey

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| mohs = {{frac|3|1|2}} – 4

| luster = metallic

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| diaphaneity = opaque

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Niningerite is a magnesium–iron–manganese sulfide mineral with the chemical formula MgS that is found in enstatite chondrite meteorites.[http://webmineral.com/data/Niningerite.shtml webminerals] Niningerite is the magnesium-dominant analog of keilite.{{cite journal

|author = M. Shinizu

|author2 = H. Yoshida

|title = The New Mineral Species Keilite (Fe,Mg)S, the Iron-dominant Analogue of Niningerite

|journal = The Canadian Mineralogist

|volume = 40

|issue = 6

|pages = 1687–1692

|date = 2002

|url = http://pubs.nrc-cnrc.gc.ca/journals.old/mineral/mineral40/tcm-168740-6.pdf

|doi = 10.2113/gscanmin.40.6.1687

|bibcode = 2002CaMin..40.1687S

|s2cid = 93381076