Mineral Species sorted by the element Ir Iridium (original) (raw)

Iridium (Ir) Element Properties

Atomic Mass 192.22
Atomic Number 77
Name Origins Latin, Iris = "rainbow."
Year Discovered 1803
Discovery Credits Discovered by S. Tennant at London, UK.
Remarks Hard, lustrous, silvery metal of the platinum group. Stable to air and water, inert to all acids, but fused NaOH will attack it. Used in special alloys and spark plugs.Diagnostic tests: There are no simple chemical tests for iridium. The element is usually found as an alloy or a sulfide mineral with other platinum group metals. Atomic Absorption Spectroscopy is used for quantitative analysis and Energy Dispersive Analysis of X-rays (EDAX) is used for qualitative analysis.
References Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also WebElements,ChemiCool

Naturally Occurring Isotopes

Symbol Isotope Mass Isotope Nuclide Number Isotope Number Natural Abundance Half-life Half-life Units Decay Mode Decay Mode MeV Decay Mode %
Ir 190.960584 191 77 37.3000% Stable
Ir 192.962917 193 77 62.7000% Stable

Mineral Species sorted by the element Ir (Iridium )

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%Ir Mineral Name Chemical Formula MW
91.17%Ir Chengdeite Ir3Fe 632.51
66.71%Ir Cuproiridsite CuIr2S4 576.25
66.13%Ir Kashinite (Ir,Rh)2S3 435.98
63.20%Ir Rutheniridosmine (Ir,Os,Ru) 182.50
55.55%Ir Tolovkite IrSbS 346.04
52.58%Ir Iridium (Ir,Os,Ru,Pt) 182.79
46.99%Ir Inaglyite PbCu3(Ir,Pt)8S16 2,454.37
45.15%Ir Iridarsenite (Ir,Ru)As2 319.28
44.37%Ir Changchengite ! IrBiS 433.27
42.96%Ir Shuangfengite IrTe2 447.42
41.99%Ir Ruthenium (Ru,Ir,Os) 137.33
36.35%Ir Mayingite IrBiTe 528.80
36.10%Ir Gaotaiite Ir3Te8 1,597.46
35.73%Ir Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 645.53
31.11%Ir Hexaferrum ! (Fe,Os,Ru,Ir) 86.51
30.87%Ir Iridisite * (Ir,Cu,Rh,Ni,Pt)S2 186.82
30.24%Ir Irarsite (Ir,Ru,Rh,Pt)AsS 254.29
29.84%Ir Bowieite (Rh,Ir,Pt)1.77S3 342.08
27.00%Ir IMA2008-055 ! (Ni,Fe,Ir) 71.19
25.20%Ir Osmium (Os,Ir) 190.71
16.56%Ir Malanite Cu(Pt,Ir)2S4 580.54
16.48%Ir Kingstonite ! (Rh,Ir,Pt)3S4 501.41
12.93%Ir Hexamolybdenum ! (Mo,Ru,Fe,Ir,Os) 104.04
10.58%Ir Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 417.75
9.57%Ir Konderite PbCu3(Rh,Pt,Ir)8S16 2,007.80

(* - Mineral Name Is Not IMA Approved)
(! - New Dana classification added or changed from Danas New Mineralogy)
(? - IMA Discredited Mineral Species Name)

There are 25 minerals with Ir in the Mineralogy Database.