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.

Classification of IridarseniteHide

Strunz-mindat (2024):

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 : A_mB_nX_p, 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.

Symbol	Source	Reference
Ird	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of IridarseniteHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United 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:

Wavelength	R₁	R₂
470nm	47.2%	46.9%
546nm	45.4%	46.1%
589nm	44.9%	46.6%
650nm	41.4%	44.0%

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. 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

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 Å³ (Calculated from Unit Cell)

Comment:

synthetic

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

View
CIF File Best | x | y | z | a | b | c

Rotation
Stop | Start

Labels
Console Off | On | Grey | Yellow

Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0011926	Iridarsenite	Kjekshus A (1971) On the properties of binary compounds with the CoSb2 type crystal structure Acta Chemica Scandinavica 25 411-422		1971	synthetic	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Iridarsenite'
loop_
_publ_author_name
'Kjekshus A'
_journal_name_full 'Acta Chemica Scandinavica'
_journal_volume 25 
_journal_year 1971
_journal_page_first 411
_journal_page_last 422
_publ_section_title
;
 On the properties of binary compounds
 with the CoSb2 type crystal structure
;
_database_code_amcsd 0011926
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ir As2'
_cell_length_a 6.0549
_cell_length_b 6.0717
_cell_length_c 6.1587
_cell_angle_alpha 90
_cell_angle_beta 113.197
_cell_angle_gamma 90
_cell_volume 208.111
_exptl_crystal_density_diffrn     10.917
_symmetry_space_group_name_H-M 'P 1 21/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ir   0.28200   0.00000   0.29300
As1   0.33800   0.36600   0.18200
As2   0.15100   0.62500   0.37000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
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 Mode	Earliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
High-𝑇 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:

Rutheniridosmine

Ruthenarsenite

Reference:

Download:

http://rruff.info/rruff_1.0/uploads/CM12_280.pdf

Synonyms of IridarseniteHide

IMA1973-021

Other Language Names for IridarseniteHide

German:Iridarsenit

Simplified Chinese:砷铱矿

Spanish:Iridarsenita

Relationship of Iridarsenite to other SpeciesHide

Structurally related to group(s):

Arsenopyrite Group

Common AssociatesHide

Associated Minerals Based on Photo Data:

4 photos of Iridarsenite associated with Rutheniridosmine	(Ir,Os,Ru)
4 photos of Iridarsenite associated with Osmium	(Os,Ir,Ru)

Related Minerals - Strunz-mindat Grouping Hide

2.EB.	Selenolaurite	RuSe₂	Iso. m3 (2/m 3) : Pa3
2.EB.	Andrieslombaardite	RhSbS	Iso. 2 3 : P2₁ 3
2.EB.	Kanatzidisite	(SbBiS₃)₂Te₂	Mon. 2/m : P2₁/m
2.EB.05a	Aurostibite	AuSb₂	Iso. m3 (2/m 3) : Pa3
2.EB.05b	Bambollaite	Cu(Se,Te)₂	Tet.
2.EB.05a	Cattierite	CoS₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Erlichmanite	OsS₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Fukuchilite	Cu₃FeS₈	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Geversite	PtSb₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Hauerite	MnS₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Insizwaite	Pt(Bi,Sb)₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Krut'aite	CuSe₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Laurite	RuS₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Penroseite	(Ni,Co,Cu)Se₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Pyrite	FeS₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Sperrylite	PtAs₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Trogtalite	CoSe₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Vaesite	NiS₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Villamanínite	(Cu,Ni,Co,Fe)S₂	Tric.
2.EB.05a	Dzharkenite	FeSe₂	Iso. m3 (2/m 3) : Pa3
2.EB.05a	Gaotaiite	Ir₃Te₈	Iso. m3 (2/m 3) : Pa3
2.EB.05a v	Cayeuxite
2.EB.10b	Alloclasite	Co_1-xFe_xAsS	Mon. 2 : P2₁
2.EB.10d	Costibite	CoSbS	Orth. mm2 : Pmn2₁
2.EB.10a	Ferroselite	FeSe₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10a	Frohbergite	FeTe₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10c	Glaucodot	(Co_0.50Fe_0.50)AsS	Orth. mm2 : Pmn2₁
2.EB.10a	Kullerudite	NiSe₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10a	Marcasite	FeS₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10a	Mattagamite	CoTe₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10e	Paracostibite	CoSbS	Orth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10e	Pararammelsbergite	NiAs₂	Orth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10f	Oenite	CoSbAs	Orth.
2.EB.10a	Petříčekite	CuSe₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15a	Anduoite	(Ru,Os)As₂	Orth.
2.EB.15a	Clinosafflorite	CoAs₂	Mon. 2/m : P2₁/m
2.EB.15a	Löllingite	FeAs₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15a	Nisbite	NiSb₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15a	Omeiite	(Os,Ru)As₂	Orth.
2.EB.15c	Paxite	CuAs₂	Mon. 2/m : P2₁/b
2.EB.15a	Rammelsbergite	NiAs₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15a	Safflorite	(Co,Ni,Fe)As₂	Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15b	Seinäjokite	(Fe,Ni)(Sb,As)₂	Orth.
2.EB.20	Arsenopyrite	FeAsS	Mon. 2/m : P2₁/b
2.EB.20	Gudmundite	FeSbS	Mon. 2/m : P2₁/b
2.EB.20	Osarsite	(Os,Ru)AsS	Mon.
2.EB.20	Ruarsite	(Ru,Os)AsS	Mon.
2.EB.25 va	Antimony-bearing Gersdorffite	Ni(As,Sb)S
2.EB.25	Cobaltite	CoAsS	Orth. mm2 : Pca2₁
2.EB.25	Gersdorffite	NiAsS	Iso. m3 (2/m 3) : Pa3
2.EB.25	Hollingworthite	(Rh,Pt,Pd)AsS	Iso. m3 (2/m 3) : Pa3
2.EB.25	Irarsite	(Ir,Ru,Rh,Pt)AsS	Iso. m3 (2/m 3) : Pa3
2.EB.25	Jolliffeite	NiAsSe	Iso. m3 (2/m 3) : Pa3
2.EB.25	Krutovite	NiAs₂	Iso. 2 3 : P2₁ 3
2.EB.25	Maslovite	PtBiTe	Iso. 2 3 : P2₁ 3
2.EB.25	Michenerite	PdBiTe	Iso. 2 3 : P2₁ 3
2.EB.25	Padmaite	PdBiSe	Iso. 4 3 2
2.EB.25	Platarsite	Pt(As,S)₂	Iso. m3 (2/m 3) : Pa3
2.EB.25	Testibiopalladite	PdSbTe	Iso.
2.EB.25	Tolovkite	IrSbS	Iso.
2.EB.25	Ullmannite	NiSbS	Iso. 2 3 : P2₁ 3
2.EB.25	Willyamite	CoSbS
2.EB.25	Changchengite	IrBiS	Iso. 2 3 : P2₁ 3
2.EB.25	Mayingite	IrBiTe	Iso. m3 (2/m 3) : Pa3
2.EB.25	Kalungaite	PdAsSe	Iso. m3 (2/m 3) : Pa3
2.EB.25	Milotaite	PdSbSe	Iso. 2 3 : P2₁ 3
2.EB.25	Paragersdorffite	Ni(As,S)₂	Iso. m3 (2/m 3) : Pa3
2.EB.25	Orthogersdorffite	NiAsS	Orth. mm2 : Pca2₁
2.EB.25	Kvačekite	NiSbSe	Iso. 2 3 : P2₁ 3
2.EB.30	Urvantsevite	Pd(Bi,Pb)₂	Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.EB.35	Rheniite	ReS₂	Tric. 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

mindat.org URL:

https://www.mindat.org/min-2044.html
Please feel free to link to this page.

Search Engines:

Look for Iridarsenite on Google

Look for Iridarsenite images on Google

Look for Iridarsenite on Bing

Look for Iridarsenite images on Bing

Look for Iridarsenite on DuckDuckGo

Look for Iridarsenite images on DuckDuckGo

Look for Iridarsenite in the Rock H. Currier Digital Library

External Links:

Look for Iridarsenite on Webmineral

Look for Iridarsenite on Wikipedia

Look for Iridarsenite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Fine Minerals from Weinrich Minerals, Inc.

Buy from McDougall Minerals

High-end worldwide specimens & outstanding customer service

The Arkenstone - Fine Minerals

Blue Gems Australian & International

Buy from David K Joyce minerals

Wilensky Exquisite Minerals

Buy rare minerals from Excalibur Minerals

References for IridarseniteHide

Reference List:

Kjekshus, A. (1971) On the properties of binary compounds, with the CoSb2 type crystal structure. Acta Chemica Scandinavica, 25, 411-422.

Fleischer, Michael, Pabst, Adolf, Mandarino, Joseph A., Chao, George Y., Cabri, Louis, J. (1976) New Mineral Names. American Mineralogist, 61 (1-2) 174-186

(2023) Iridarsenite. Handbook of Mineralogy. Mineralogical Society of America

Localities for IridarseniteHide

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.

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 Nagchu Prefecture (Naqu Prefecture) Amdo Co. (Anduo Co.) ⓘ Anduo Cr deposit	Anthony et al. (1990)
Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture) Qusum Co. (Qusong Co.) ⓘ Luobusha ophiolite ("Luobusa ophiolite")	Wenji Bai et al. (2007)

Cuba
Holguín Province ⓘ Mejías beach placer	Acta Geológica Hispánica et al. (1-4)

Finland
North Ostrobothnia Nivala ⓘ Hitura Nickel Mine	Kojonen K: K. (Cu,Fe)

Greece
Thessaly Trikala Meteora ⓘ Pefki	Argirios Kapsiotis et al. (2011)

Japan
Hokkaidō Prefecture Rumoi Subprefecture Tomamae District Haboro ⓘ Ainusawa River	NISHIO–HAMANE et al. (2022)
Shosanbetsu ⓘ Minamichiyoda	NISHIO–HAMANE et al. (2022)

Papua New Guinea (TL)
Oro Province Ioma area ⓘ Waria River (TL)	Harris (1974)

Russia
Bashkortostan Uchalinsky District ⓘ Unspecified gold placer	Pavel M. Kartashov analytical data 2018
Buryatia Okinsky District Ulan-Sar’dag Ophiolite ⓘ Kitoy River placers	Airiyants et al. (2022)
Chelyabinsk Oblast Miass River ⓘ Maly Iremel placer	Zaykov et al. (2017)
Krasnoyarsk Krai ⓘ Kingash	Alexander V. Dedeev et al (2002)
Western Sayan range ⓘ Zolotaya river placers ?	Tolstyk et al. (1997) +1 other reference
Tuva Kaa-Khemsky District Kaakhem ophiolite belt ⓘ Kundus placer	Oidup et al. (2012)

Serbia
Central Serbia Rasina District Trstenik Veluće ⓘ Veluce ophiolite complex	Krstic et al. (1997)

South Africa
ⓘ Witwatersrand goldfield	Cairncross et al. (1995)

USA
Alaska Bethel Census Area Goodnews Bay Salmon River - Red Mountain District ⓘ Dowry Creek mine	USGS Open-File Report 01-269 +1 other reference
ⓘ Fox Gulch	Fechner SA (1988) +1 other reference
ⓘ Platinum Creek	USGS Open-File Report 01-269

Iridarsenite

About IridarseniteHide

Unique IdentifiersHide

IMA Classification of IridarseniteHide