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Iridium

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Formula:
(Ir,Os,Ru)
System:
Isometric
Hardness:
6 - 7
Natural iridium often contains distinct amounts of Os, Ru or Pt.
The definition of iridium now incorporates old "osmiridium" and "ruthenosmiridium" mineral species (all have Ir as the dominant element).

See also (hexagonal) rutheniridosmine.


Note: The type locality is not determined.

Classification of Iridium

Approved, 'Grandfathered' (first described prior to 1959)
1.AF.10

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.:
1.2.1.2
1.2.1.2

1 : NATIVE ELEMENTS AND ALLOYS
2 : Platinum Group Metals and Alloys
1.77

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
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http://www.mindat.org/min-2045.html
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Physical Properties of Iridium

Hardness (Mohs):
6 - 7

Crystallography of Iridium

Crystal System:
Isometric
Cell Parameters:
a = 3.83Å
Unit Cell Volume:
V 56.18 ų (Calculated from Unit Cell)

Optical Data of Iridium

Type:
Isotropic

Chemical Properties of Iridium

Formula:
(Ir,Os,Ru)
All elements listed in formula:
Common Impurities:
Pt,Au,Pd,Cu,Fe

Relationship of Iridium to other Species

1.AF.05Osmium(Os,Ir,Ru)
1.AF.05Rutheniridosmine(Ir,Os,Ru)
1.AF.05Ruthenium(Ru,Ir)
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
1.31AnyuiiteAuPb2
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
1.76Osmium(Os,Ir,Ru)
1.82PlatinumPt
1.83HongshiitePtCu
1.84NiggliitePtSn
1.85IsoferroplatinumPt3Fe
1.86TetraferroplatinumPtFe
1.87TulameenitePt2CuFe
1.88FerronickelplatinumPt2FeNi
1.89Rhodium(Rh,Pt)
1.2.1.1PlatinumPt
1.2.1.3Rhodium(Rh,Pt)
1.2.1.4Palladium(Pd,Pt)
1.2.1.5Rutheniridosmine(Ir,Os,Ru)

Other Names for Iridium

Name in Other Languages:
Russian:Иридий
Simplified Chinese:自然铱

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 Iridium

Reference List:
Harris, D.C., Cabri, L.J. (1973) The nomenclature of the natural alloys of osmium, iridium and ruthenium based on new compositional data of alloys from world-wide occurrences. The Canadian Mineralogist: 12: 104-112.

Cabri, L.J., Feather, C.E. (1975) Platinum-iron alloys; a nomenclature based on a study of natural and synthetic alloys. The Canadian Mineralogist: 13: 117-126.

Harris, D.C., Cabri, L.J. (1991) Nomenclature of platinum-group-element alloys; review and revision. The Canadian Mineralogist: 29: 231-237.

Internet Links for Iridium

Localities for Iridium

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.
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