Erlichmanite

{{Short description|Sulfide mineral}}

{{Infobox mineral

| name = Erlichmanite

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| category = Pyrite

| formula = {{Format molecular formula|OsS2}}

| IMAsymbol = Erl{{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 = 254.33gm

| strunz = 2/D.17-110

| dana = 2.12.1.16

| system = Isometric

| class = Diploidal

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| unit cell = 177.47 ų

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| colour = Grey

| habit = Pyritohedral crystals or grains

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| mohs = 4.5-5.5

| luster = Metallic

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| diaphaneity = Opaque

| gravity = 8.28

| density = 8.28 g/cm3 (Measured), 9.59 g/cm3 (Calc)

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| impurities = Iridium, Rhodium, Ruthenium, Paladium

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Erlichmanite is the naturally occurring mineral form of osmium sulfide (OsS₂). It is grey with a metallic luster, hardness around 5, and specific gravity about 9.{{Cite web|url=https://www.mindat.org/min-1401.html|title=Erlichmanite}} It is found in noble metal placer deposits.{{Cite web|url=http://www.webmineral.com/data/Erlichmanite.shtml|title = Erlichmanite Mineral Data}} Named for Jozef Erlichman, electron microprobe analyst at the NASA Ames Research Center.http://www.handbookofmineralogy.org/pdfs/erlichmanite.pdf {{Bare URL PDF|date=March 2022}}