Osarsite
A valid IMA mineral species
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About Osarsite
Formula:
(Os,Ru)AsS
Colour:
Gray
Lustre:
Metallic
Hardness:
6
Specific Gravity:
8.44 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
The name reflects its composition: osmium, arsenic and sulfur. The related minerals ruarsite, irarsite, and platarsite are similarly named.
Unique Identifiers
Mindat ID:
3034
Long-form identifier:
mindat:1:1:3034:8
IMA Classification of Osarsite
Approved
IMA Formula:
OsAsS
Approval year:
1971
First published:
1972
Approval history:
IMA1971-025
Classification of Osarsite
2.EB.20
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.
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.
2.12.4.3
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.12.59
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
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 Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Osa | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Osarsite
Metallic
Transparency:
Opaque
Colour:
Gray
Comment:
In reflected light
Hardness:
6 on Mohs scale
Density:
8.44 g/cm3 (Calculated)
Optical Data of Osarsite
Anisotropism:
Weak but distinct in air.
Colour in reflected light:
gray
Chemistry of Osarsite
Mindat Formula:
(Os,Ru)AsS
Element Weights:
Elements listed:
Common Impurities:
Ir,Pd,Pt,Rh,Ni,Fe,Co
Crystallography of Osarsite
Crystal System:
Monoclinic
Cell Parameters:
a = 5.933(1) Å, b = 5.916(2) Å, c = 6.009(2) Å
β = 112.35(3)°
β = 112.35(3)°
Ratio:
a:b:c = 1.003 : 1 : 1.016
Unit Cell V:
195.07 ų (Calculated from Unit Cell)
Z:
4
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.79 Å | (100) |
| 2.74 Å | (70) |
| 2.78 Å | (60) |
| 2.01 Å | (60) |
| 1.892 Å | (100) |
| 1.870 Å | (80) |
| 1.832 Å | (60 |
Geological Environment
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 |
| 37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Osarsite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 123218.
Geological Setting of Type Material:
Placer sand
Associated Minerals at Type Locality:
Synonyms of Osarsite
Other Language Names for Osarsite
Relationship of Osarsite to other Species
Member of:
Other Members of Arsenopyrite Group:
| Arsenopyrite | FeAsS | Mon. 2/m : P21/b |
| Glaucodot | (Co0.50Fe0.50)AsS | Orth. mm2 : Pmn21 |
| Gudmundite | FeSbS | Mon. 2/m : P21/b |
| Ruarsite | (Ru,Os)AsS | Mon. |
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Osarsite associated with Hollingworthite | (Rh,Pt,Pd)AsS |
| 2 photos of Osarsite associated with Isoferroplatinum | Pt3Fe |
| 2 photos of Osarsite associated with Native Osmium | (Os,Ir,Ru) |
| 1 photo of Osarsite associated with Troilite | FeS |
Related Minerals - Strunz-mindat Grouping
| 2.EB. | Selenolaurite | RuSe2 |
| 2.EB. | Andrieslombaardite | RhSbS |
| 2.EB. | Iridarsenite | (Ir,Ru)As2 |
| 2.EB. | Kanatzidisite | (SbBiS3)2Te2 |
| 2.EB.05a | Vaesite | NiS2 |
| 2.EB.05a | Hauerite | MnS2 |
| 2.EB.05a | Laurite | RuS2 |
| 2.EB.05a | Gaotaiite | Ir3Te8 |
| 2.EB.05a | Penroseite | (Ni,Co,Cu)Se2 |
| 2.EB.05a | Fukuchilite | Cu3FeS8 |
| 2.EB.05a | Villamanínite | (Cu,Ni,Co,Fe)S2 |
| 2.EB.05a | Erlichmanite | OsS2 |
| 2.EB.05a | Sperrylite | PtAs2 |
| 2.EB.05a | Geversite | PtSb2 |
| 2.EB.05a | Cattierite | CoS2 |
| 2.EB.05a | Aurostibite | AuSb2 |
| 2.EB.05a | Trogtalite | CoSe2 |
| 2.EB.05a v | Cayeuxite | |
| 2.EB.05a | Kruťaite | CuSe2 |
| 2.EB.05a | Pyrite | FeS2 |
| 2.EB.05a | Insizwaite | Pt(Bi,Sb)2 |
| 2.EB.05b | Bambollaite | Cu(Se,Te)2 |
| 2.EB.05a | Dzharkenite | FeSe2 |
| 2.EB.10a | Marcasite | FeS2 |
| 2.EB.10e | Paracostibite | CoSbS |
| 2.EB.10f | Oenite | CoSbAs |
| 2.EB.10e | Pararammelsbergite | NiAs2 |
| 2.EB.10a | Mattagamite | CoTe2 |
| 2.EB.10a | Frohbergite | FeTe2 |
| 2.EB.10d | Costibite | CoSbS |
| 2.EB.10b | Alloclasite | Co1-xFexAsS |
| 2.EB.10c | Glaucodot | (Co0.50Fe0.50)AsS |
| 2.EB.10a | Petříčekite | CuSe2 |
| 2.EB.10a | Kullerudite | NiSe2 |
| 2.EB.10a | Ferroselite | FeSe2 |
| 2.EB.15b | Seinäjokite | FeSb2 |
| 2.EB.15a | Rammelsbergite | NiAs2 |
| 2.EB.15a | Clinosafflorite | CoAs2 |
| 2.EB.15c | Paxite | CuAs2 |
| 2.EB.15a | Nisbite | NiSb2 |
| 2.EB.15a | Löllingite | FeAs2 |
| 2.EB.15a | Safflorite | (Co,Ni,Fe)As2 |
| 2.EB.15a | Omeiite | (Os,Ru)As2 |
| 2.EB.15a | Anduoite | (Ru,Os)As2 |
| 2.EB.20 | Arsenopyrite | FeAsS |
| 2.EB.20 | Ruarsite | (Ru,Os)AsS |
| 2.EB.20 | Gudmundite | FeSbS |
| 2.EB.25 | Mayingite | IrBiTe |
| 2.EB.25 | Maslovite | PtBiTe |
| 2.EB.25 | Paragersdorffite | Ni(As,S)2 |
| 2.EB.25 | Orthogersdorffite | NiAsS |
| 2.EB.25 | Jolliffeite | NiAsSe |
| 2.EB.25 | Cobaltite | CoAsS |
| 2.EB.25 | Guixiangite | NiBiS |
| 2.EB.25 | Testibiopalladite | PdSbTe |
| 2.EB.25 va | Antimony-bearing Gersdorffite | Ni(As,Sb)S |
| 2.EB.25 | Kalungaite | PdAsSe |
| 2.EB.25 | Hollingworthite | (Rh,Pt,Pd)AsS |
| 2.EB.25 | Michenerite | PdBiTe |
| 2.EB.25 | Gersdorffite | NiAsS |
| 2.EB.25 | Milotaite | PdSbSe |
| 2.EB.25 | Tolovkite | IrSbS |
| 2.EB.25 | Platarsite | Pt(As,S)2 |
| 2.EB.25 | Willyamite | CoSbS |
| 2.EB.25 | Changchengite | IrBiS |
| 2.EB.25 | Kvačekite | NiSbSe |
| 2.EB.25 | Krutovite | NiAs2 |
| 2.EB.25 | Padmaite | PdBiSe |
| 2.EB.25 | Ullmannite | NiSbS |
| 2.EB.25 | Irarsite | (Ir,Ru,Rh,Pt)AsS |
| 2.EB.30 | Urvantsevite | Pd(Bi,Pb)2 |
| 2.EB.35 | Rheniite | ReS2 |
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.
Internet Links for Osarsite
mindat.org URL:
https://www.mindat.org/min-3034.html
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External Links:
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References for Osarsite
Localities for Osarsite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Algeria | |
| Augé et al. (2012) |
Brazil | |
| Marchetto (1990) |
Canada | |
| Hora et al. (2011) |
| Wilson et al. (2013) |
Chile | |
| González-Jiménez et al. (2016) |
| Galdames et al. (2010) | |
China | |
| Anthony et al. (1990) |
Finland | |
| Törroos Ragnar | |
| 33rd International Geological Congress (2008) |
| Kojonen et al. (2014) |
| Hytönen (1999) |
| Econ Geol (1995) |
Greece | |
| Tsikouras et al. (2016) |
| Tsikouras et al. (2016) |
| Auge (1985) +1 other reference |
India | |
| Alapieti et al. (2005) +1 other reference |
Kazakhstan | |
| Saveliev et al. (2023) |
| Saveliev et al. (2023) | |
Norway | |
| Nilsson (1990) |
Russia | |
| Airiyants et al. (2021) |
| Spiridonov et al. (2018) |
| Kolotilina et al. (2019) |
| Shvedov et al. (2017) +1 other reference |
| Podlipsky et al. (2015) | |
| Kolotilina et al. (2019) | |
| Sidorov et al. (2021) |
| Tolstykh et al. (2004) +2 other references |
| Tolstykh et al. (2004) +1 other reference | |
| Barkov et al. (2023) |
| Kiseleva et al. (2014) |
| Stepanov et al. (2019) |
| Stepanov et al. (2019) |
| Stepanov et al. (2020) | |
| Oidup et al. (2012) |
South Africa | |
| Cairncross et al. (1995) | |
Spain | |
| Mineralogy and Petrology: 56: 25-50. |
| Gervilla et al. (2002) | |
USA | |
| Canadian Mineralogist 40:463-471 |
| Snetsinger (1972) +2 other references |
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Zhelos intrusion, Irkutsk Oblast, Russia