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Osmium

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Formula:
(Os,Ir,Ru)
System:
Hexagonal
Colour:
White
Lustre:
Metallic
Hardness:
6 - 7
Name:
After the Greek for odor, for it's pungent and irritating odor when heated in air.
This page provides mineralogical data about Osmium.

Classification of Osmium

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
1.AF.05

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
F : Platinum group elements
Dana 7th ed.:
1.2.2.1
1.2.2.1

1 : NATIVE ELEMENTS AND ALLOYS
2 : Platinum Group Metals and Alloys
1.76

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
mindat.org URL:
http://www.mindat.org/min-3037.html
Please feel free to link to this page.

Occurrences of Osmium

Geological Setting:
From ultramafic rocks and placers.

Physical Properties of Osmium

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
White
Streak:
Grey
Hardness (Mohs):
6 - 7
Hardness (Vickers):
VHN25=1206 - 1246 kg/mm2
Density:
22.48 g/cm3 (Measured)    22.59 g/cm3 (Calculated)

Crystallography of Osmium

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Cell Parameters:
a = 2.7341Å, c = 4.3197Å
Ratio:
a:c = 1 : 1.58
Unit Cell Volume:
V 27.96 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Prismatic inclusions.

Optical Data of Osmium

Type:
Anisotropic
Anisotropism:
Strong, reddish orange
Colour in reflected light:
White with bluish gray tent
Pleochroism:
Weak

Chemical Properties of Osmium

Formula:
(Os,Ir,Ru)
Essential elements:
All elements listed in formula:
Common Impurities:
Pt,Rh,Pd

Relationship of Osmium to other Species

1.AF.05Rutheniridosmine(Ir,Os,Ru)
1.AF.05Ruthenium(Ru,Ir)
1.AF.10Iridium(Ir,Os,Ru)
1.AF.10Palladium(Pd,Pt)
1.AF.10PlatinumPt
1.AF.10Rhodium(Rh,Pt)
1.1CopperCu
1.2SilverAg
1.5GoldAu
1.6AuricuprideCu3Au
1.7Tetra-auricuprideAuCu
1.8ZincZn
1.9CadmiumCd
1.10DanbaiteCuZn2
1.11ZhanghengiteCuZn
1.12MercuryHg
1.13KolymiteCu7Hg6
1.14MoschellandsbergiteAg2Hg3
1.15EugeniteAg11Hg2
1.16SchachneriteAg1.1Hg0.9
1.17ParaschachneriteAg3Hg2
1.18LuanheiteAg3Hg
1.19Weishanite(Au,Ag)3Hg2
1.20IndiumIn
1.21AluminiumAl
1.22Khatyrkite(Cu,Zn)Al2
1.23Cupalite(Cu,Zn)Al
1.24DiamondC
1.25GraphiteC
1.26ChaoiteC
1.27LonsdaleiteC
1.28SiliconSi
1.29TinSn
1.30LeadPb
1.31AnyuiiteAu(Pb,Sb)2
1.31NovodnepriteAuPb3
1.32LeadamalgamPb0.7Hg0.3
1.33ArsenicAs
1.34ArsenolampriteAs
1.35PaxiteCuAs2
1.36KoutekiteCu5As2
1.37DomeykiteCu3As
1.38Algodonite(Cu1-xAsx)
1.39NovákiteCu20AgAs10
1.40KutinaiteAg6Cu14As7
1.41AntimonySb
1.42StibarsenAsSb
1.43ParadocrasiteSb3As
1.44HorsforditeCu, Sb
1.45CuprostibiteCu2(Sb,Tl)
1.46Allargentum(Ag1-xSbx)
1.47AurostibiteAuSb2
1.48DyscrasiteAg3Sb
1.49BismuthBi
1.50MaldoniteAu2Bi
1.51SulphurS8
1.52RosickýiteS
1.53SeleniumSe
1.54TelluriumTe
1.55ChromiumCr
1.56RheniumRe
1.57IronFe
1.58ChromferideFe3Cr1-x (x=0.6)
1.59FerchromideCr3Fe1-x
1.60WairauiteCoFe
1.61NickelNi
1.62Kamacite(Fe,Ni)
1.63Taenite(Fe,Ni)
1.64TetrataeniteFeNi
1.65AwaruiteNi3Fe
1.66Palladium(Pd,Pt)
1.67PotaritePdHg
1.68PaolovitePd2Sn
1.69Stannopalladinite(Pd,Cu)3Sn2
1.70CabriitePd2CuSn
1.71Taimyrite-I(Pd,Cu,Pt)3Sn
1.72Atokite(Pd,Pt)3Sn
1.73Rustenburgite(Pt,Pd)3Sn
1.74Zvyagintsevite(Pd,Pt,Au)3(Pb,Sn)
1.75PlumbopalladinitePd3Pb2
1.77Iridium(Ir,Os,Ru)
1.82PlatinumPt
1.83HongshiitePtCu
1.84NiggliitePtSn
1.85IsoferroplatinumPt3Fe
1.86TetraferroplatinumPtFe
1.87TulameenitePt2CuFe
1.88FerronickelplatinumPt2FeNi
1.89Rhodium(Rh,Pt)

Other Names for Osmium

Name in Other Languages:
Basque:Osmio
Belarusian:Осмій
Bosnian (Latin Script):Osmijum
Bulgarian:Осмий
Catalan:Osmi
Corsican:Osmiu
Croatian:Osmij
Czech:Osmium
Danish:Osmium
Dutch:Osmium
Esperanto:Osmio
Estonian:Osmium
Finnish:Osmium
French:Osmium
Friulian:Osmi
Galician:Osmio
German:Osmium
Hungarian:Ozmium
Icelandic:Osmín
Ido:Osmio
Indonesian:Osmium
Italian:Osmio
Javanese:Osmium
Korean:오스뮴
Kurdish (Latin Script):Osmiyûm
Latin:Osmium
Latvian:Osmijs
Lithuanian:Osmis
Lojban:jinmrbosmi
Luxembourgish:Osmium
Manx:Osmium
Norwegian (Bokmål):Osmium
Norwegian (Nynorsk):Osmium
Occitan:Òsmi
Persian:اسمیوم
Polish:Osm
Portuguese:Ósmio
Romanian:Osmiu
Russian:Осмий
Serbian (Cyrillic Script):Осмијум
Serbo-Croatian:Osmijum
Sicilian:Òsmiu
Simplified Chinese:自然锇
Slovak:Osmium
Slovenian:Osmij
Spanish:Osmio
Swedish:Osmium
Traditional Chinese:自然鋨
Turkish:Osmiyum
Ukrainian:Осмій

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Osmium

Reference List:
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 111-113.

Canadian Mineralogist (1974): 12: 104-112.

Canadian Mineralogist (1991): 29: 231-237.

Internet Links for Osmium

Localities for Osmium

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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