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Iridarsenite

A valid IMA mineral species
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00018920017271923932874.jpg
Iridarsenite, etc.

Unspecified gold placer, Uchalinsky District, Bashkortostan, Russia
04414780017271923963548.jpg
Iridarsenite

Unspecified gold placer, Uchalinsky District, Bashkortostan, Russia
00018920017271923932874.jpg
Iridarsenite, etc.

Unspecified gold placer, Uchalinsky District, Bashkortostan, Russia
04414780017271923963548.jpg
Iridarsenite

Unspecified gold placer, Uchalinsky District, Bashkortostan, Russia
00018920017271923932874.jpg
Iridarsenite, etc.

Unspecified gold placer, Uchalinsky District, Bashkortostan, Russia
04414780017271923963548.jpg
Iridarsenite

Unspecified gold placer, Uchalinsky District, Bashkortostan, Russia
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About IridarseniteHide

Formula:
(Ir,Ru)As2
Lustre:
Metallic
Hardness:
5 - 5½
Specific Gravity:
10.9 (Calculated)
Crystal System:
Monoclinic
Name:
Named for the composition that include IRIDium and ARSENic.
Compare UM1997-04-As:IrSSe.


Unique IdentifiersHide

Mindat ID:
2044
Long-form identifier:
mindat:1:1:2044:8

IMA Classification of IridarseniteHide

Classification of IridarseniteHide

Strunz-mindat (2026):
2.EB.

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
Dana 8th ed.:
2.12.4.5

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
Hey's CIM Ref.:
3.12.63

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
IrdIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of IridarseniteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of IridarseniteHide

Lustre:
Metallic
Transparency:
Opaque
Hardness:
5 - 5½ on Mohs scale
Hardness:
VHN100=488 - 606 kg/mm2 - Vickers
Density:
10.9 g/cm3 (Calculated)

Optical Data of IridarseniteHide

Anisotropism:
Weak but distinct
Bireflectance:
Weak to nil.
Reflectivity:
WavelengthR1 (%)R2 (%)
470nm47.2%46.9%
546nm45.4%46.1%
589nm44.9%46.6%
650nm41.4%44.0%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 47.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Medium gray with brownish tint (in oil)

Chemistry of IridarseniteHide

Mindat Formula:
(Ir,Ru)As2
Element Weights:
Element% weight
Ir56.194 %
As43.806 %

Calculated from ideal end-member formula.
Elements listed:
As, Ir, Ru - search for minerals with similar chemistry
Common Impurities:
Os,Pt,Rh,Pd,S

Crystallography of IridarseniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 6.06 Å, b = 6.07 Å, c = 6.15 Å
β = 113.27°
Ratio:
a:b:c = 0.998 : 1 : 1.013
Unit Cell V:
207.82 ų (Calculated from Unit Cell)
Comment:
synthetic

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011926IridarseniteKjekshus A (1971) On the properties of binary compounds with the CoSb2 type crystal structure Acta Chemica Scandinavica 25 411-4221971synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.90 Å(100)
2.840 Å(70)
2.069 Å(60)
2.610 Å(50)
1.910 Å(50)
1.943 Å(40)
1.875 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])
Stage 4b: Highly evolved igneous rocks>3.0
36 : Carbonatites, kimberlites, and related igneous rocks
Stage 5: Initiation of plate tectonics<3.5-2.5
38 : Ophiolites

Type Occurrence of IridarseniteHide

Type Locality:
ⓘ Waria River, Ioma area, Oro Province, Papua New Guinea
General Appearance of Type Material:
Inclusions to 60 µm in rutheniridosmine.
Place of Conservation of Type Material:
Geological Survey of Canada, Ontario, Canada, number 12160.
Canadian Museum of Nature, Ottawa, Ontario, Canada.
Associated Minerals at Type Locality:
RuthenarseniteRutheniridosmine
Reference:
Harris, D.C. (1974) Ruthenarsenite and iridarsenite, two new minerals from the territory of Papua and New Guinea and associated irarsite, laurite and cubic iron-bearing platinum. The Canadian Mineralogist: 12: 280-284.

Synonyms of IridarseniteHide

Other Language Names for IridarseniteHide

Simplified Chinese:砷铱矿
Spanish:Iridarsenita

Relationship of Iridarsenite to other SpeciesHide

Structurally related to group(s):
Arsenopyrite Group

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Iridarsenite associated with Rutheniridosmine(Ir,Os,Ru)
4 photos of Iridarsenite associated with Native Osmium(Os,Ir,Ru)

Related Minerals - Strunz-mindat GroupingHide

2.EB.SelenolauriteRuSe2Iso. m3(2/m3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 23 : P213
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aVaesiteNiS2Iso. m3(2/m3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3(2/m3) : Pa3
2.EB.05aLauriteRuS2Iso. m3(2/m3) : Pa3
2.EB.05aGaotaiiteIr3Te8Iso. m3(2/m3) : Pa3
2.EB.05aPenroseite(Ni,Co,Cu)Se2Iso. m3(2/m3) : Pa3
2.EB.05aFukuchiliteCu3FeS8Iso. m3(2/m3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aErlichmaniteOsS2Iso. m3(2/m3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3(2/m3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3(2/m3) : Pa3
2.EB.05aCattieriteCoS2Iso. m3(2/m3) : Pa3
2.EB.05aAurostibiteAuSb2Iso. m3(2/m3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3(2/m3) : Pa3
2.EB.05a v'Cayeuxite'
2.EB.05aKruťaiteCuSe2Iso. m3(2/m3) : Pa3
2.EB.05aPyriteFeS2Iso. m3(2/m3) : Pa3
2.EB.05aInsizwaitePtBi2Iso. m3(2/m3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aDzharkeniteFeSe2Iso. m3(2/m3) : Pa3
2.EB.10aMarcasiteFeS2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm(2/m2/m2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.10ePararammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pbca
2.EB.10aMattagamiteCoTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10dCostibiteCoSbSOrth. mm2 : Pmn21
2.EB.10bAlloclasiteCo1-xFexAsSMon. 2 : P21
2.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth. mm2 : Pmn21
2.EB.10aPetříčekiteCuSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aKulleruditeNiSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFerroseliteFeSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15bSeinäjokiteFeSb2Orth.
2.EB.15aRammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aNisbiteNiSb2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aLöllingiteFeAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aSafflorite(Co,Ni,Fe)As2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aOmeiiteOsAs2Orth.
2.EB.15aAnduoiteRuAs2Orth.
2.EB.20ArsenopyriteFeAsSMon. 2/m : P21/b
2.EB.20Ruarsite(Ru,Os)AsSMon.
2.EB.20Osarsite(Os,Ru)AsSMon.
2.EB.20GudmunditeFeSbSMon. 2/m : P21/b
2.EB.25MayingiteIrBiTeIso. m3(2/m3) : Pa3
2.EB.25MaslovitePtBiTeIso. 23 : P213
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25SulfopadmaitePdBiSIso. 23 : P213
2.EB.25JolliffeiteNiAsSeIso. m3(2/m3) : Pa3
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GuixiangiteNiBiSIso. 23 : P213
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25 va'Antimony-bearing Gersdorffite'Ni(As,Sb)S
2.EB.25KalungaitePdAsSeIso. m3(2/m3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3(2/m3) : Pa3
2.EB.25MicheneritePdBiTeIso. 23 : P213
2.EB.25GersdorffiteNiAsSIso. 23 : P213
2.EB.25MilotaitePdSbSeIso. 23 : P213
2.EB.25TolovkiteIrSbSIso.
2.EB.25'Platarsite'Pt(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 23 : P213
2.EB.25KvačekiteNiSbSeIso. 23 : P213
2.EB.25KrutoviteNiAs2Iso. 23 : P213
2.EB.25PadmaitePdBiSeIso. 432
2.EB.25UllmanniteNiSbSIso. 23 : P213
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3(2/m3) : Pa3
2.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.EB.35RheniiteReS2Tric. 1 : P1

Other InformationHide

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

Internet Links for IridarseniteHide

References for IridarseniteHide

Localities for IridarseniteHide

Showing 21 localities.

This 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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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
China
 
  • Tibet
    • Nagqu
      • Amdo Co. (Anduo Co.)
Anthony et al. (1990)
    • Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture)
      • Qusum Co. (Qusong Co.)
Bai et al. (2007)
Cuba
 
  • Holguín Province
Acta Geológica Hispánica et al. (1-4)
Finland
 
  • Lapland
    • Sodankylä
      • Kevitsansarvi (Keivitsansarvi)
González-Jiménez et al. (2025)
  • North Ostrobothnia
    • Nivala
Kojonen K: K. (2005)
Greece
 
  • Thessaly
    • Trikala
      • Meteora
Kapsiotis et al. (2011)
Japan
 
  • Hokkaidō Prefecture
    • Rumoi Subprefecture
      • Tomamae District
        • Haboro
NISHIO–HAMANE et al. (2022)
        • Shosanbetsu
NISHIO–HAMANE et al. (2022)
Papua New Guinea (TL)
 
  • Oro Province
    • Ioma area
Harris (1974)
Russia
 
  • Bashkortostan
    • Uchalinsky District
Pavel M. Kartashov analytical data 2018
  • Buryatia
    • Okinsky District
      • Ulan-Sar’dag Ophiolite
Airiyants et al. (2021)
  • Chelyabinsk Oblast
    • Miass River
Zaykov et al. (2017)
  • Krasnoyarsk Krai
Alexander V. Dedeev et al (2002) +1 other reference
    • Western Sayan range
Tolstyk et al. (1997) +1 other reference
  • Murmansk Oblast
    • Kolsky District
  • Tuva
    • Kaa-Khemsky District
      • Kaakhem ophiolite belt
Oidup et al. (2012)
Serbia
 
  • Central Serbia
    • Rasina District
      • Trstenik
        • Veluće
Krstic et al. (1997)
South Africa
 
Cairncross et al. (1995)
USA
 
  • Alaska
    • Bethel Census Area
      • Goodnews Bay
        • Salmon River - Red Mountain District
USGS Open-File Report 01-269 +1 other reference
Fechner SA (1988) +1 other reference
USGS Open-File Report 01-269
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