Argentopentlandite
A valid IMA mineral species
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About Argentopentlandite
Formula:
Ag(Fe,Ni)8S8
Colour:
Bronze brown
Lustre:
Metallic
Hardness:
3½
Specific Gravity:
4.66 (Calculated)
Crystal System:
Isometric
Member of:
Name:
For its silver content and relation to pentlandite.
Unique Identifiers
Mindat ID:
291
Long-form identifier:
mindat:1:1:291:6
IMA Classification of Argentopentlandite
Approved
Approval year:
1970
Classification of Argentopentlandite
2.BB.15
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
B : With Ni
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
B : With Ni
2.7.1.2
2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8
2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8
3.2.19
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
2 : Sulphides etc. of Ag
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
2 : Sulphides etc. of Ag
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Apn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Apn | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Pronunciation of Argentopentlandite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Argentopentlandite
Metallic
Transparency:
Opaque
Colour:
Bronze brown
Hardness:
3½ on Mohs scale
Hardness:
VHN50=132 - 154 kg/mm2 - Vickers
Cleavage:
Very Good
Well developed on {111}
Well developed on {111}
Density:
4.66 g/cm3 (Calculated)
Optical Data of Argentopentlandite
Type:
Isotropic
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 400nm | 20.4% |
| 420nm | 21.0% |
| 440nm | 21.9% |
| 460nm | 22.9% |
| 480nm | 24.2% |
| 500nm | 25.6% |
| 520nm | 27.2% |
| 540nm | 28.8% |
| 560nm | 30.4% |
| 580nm | 31.9% |
| 600nm | 33.3% |
| 620nm | 34.6% |
| 640nm | 35.8% |
| 660nm | 36.8% |
| 680nm | 37.8% |
| 700nm | 38.6% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 38.6%.
Colour in reflected light:
Cinnamon-brown
Chemistry of Argentopentlandite
Mindat Formula:
Ag(Fe,Ni)8S8
Element Weights:
Elements listed:
Common Impurities:
Cu
Crystallography of Argentopentlandite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
Fm3m
Cell Parameters:
a = 10.521(3) Å
Unit Cell V:
1,164.58 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Octahedral crystals, massive.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0005093 | Argentopentlandite | Hall S R, Stewart J M (1973) The crystal structure of argentian pentlandite (Fe,Ni)8AgS8, compared with the refined structure of pentlandite (Fe,Ni)9S8 The Canadian Mineralogist 12 169-177 | ![]() | 1973 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.06 Å | (2) |
| 5.25 Å | (2) |
| 3.71 Å | (2) |
| 3.170 Å | (10) |
| 2.018 Å | (4) |
| 1.858 Å | (10) |
| 1.072 Å | (3) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| 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 |
Geological Setting:
Pyrite and cubanite hydrothermal veins, skarn deposits.
Type Occurrence of Argentopentlandite
Synonyms of Argentopentlandite
Other Language Names for Argentopentlandite
Dutch:Argentopentlandiet
Finnish:Hopeapentlandiitti
French:Argentopentlandite
German:Argentopentlandit
Norwegian:Argentopentlanditt
Simplified Chinese:银镍黄铁矿
Spanish:Argentopentlandita
Relationship of Argentopentlandite to other Species
Member of:
Other Members of Pentlandite Group:
| Cobaltpentlandite | Co9S8 | Iso. m3m(4/m32/m) : Fm3m |
| Geffroyite | (Cu,Fe,Ag)9(Se,S)8 | Iso. m3m(4/m32/m) : Fm3m |
| Oberthürite | Rh3Ni32S32 | Iso. |
| Pentlandite | (NixFey)Σ9S8 | Iso. m3m(4/m32/m) : Fm3m |
| Shadlunite | (Pb,Cd)(Fe,Cu)8S8 | Iso. m3m(4/m32/m) : Fm3m |
| Sugakiite | Cu(Fe,Ni)8S8 | Tet. 4/mmm(4/m2/m2/m) : P42/mnm |
| Wangyanite | PdNi8S8 | Iso. m3m(4/m32/m) : Fd3c |
Common Associates
Associations Based on Photo Data:
| 17 photos of Argentopentlandite associated with Chalcopyrite | CuFeS2 |
| 8 photos of Argentopentlandite associated with Pentlandite | (NixFey)Σ9S8 |
| 5 photos of Argentopentlandite associated with Magnetite | Fe2+Fe3+2O4 |
| 5 photos of Argentopentlandite associated with Cubanite | CuFe2S3 |
| 5 photos of Argentopentlandite associated with Altaite | PbTe |
| 4 photos of Argentopentlandite associated with Galena | PbS |
| 3 photos of Argentopentlandite associated with Maslovite | PtBiTe |
| 3 photos of Argentopentlandite associated with Froodite | α-PdBi2 |
| 2 photos of Argentopentlandite associated with Native Silver | Ag |
| 2 photos of Argentopentlandite associated with Paolovite | Pd2Sn |
Related Minerals - Strunz-mindat Grouping
| 2.BB. | Arsenotučekite | Ni18Sb3AsS16 |
| 2.BB. | Hrabákite | Ni9PbSbS8 |
| 2.BB. | 'UM2007-27-S:CuFeIrNiRh' | (Ni,Fe,Cu,Rh,Ir)11S9 |
| 2.BB. | Horomanite | Fe6Ni3S8 |
| 2.BB. | Samaniite | Cu2Fe5Ni2S8 |
| 2.BB.05 | Heazlewoodite | Ni3S2 |
| 2.BB.05 | 'UM2007-30-S:Fe' | Fe3S2 |
| 2.BB.05 | Vozhminite | (Ni,Co)4(As,Sb)S2 |
| 2.BB.05 | Oregonite | Ni2FeAs2 |
| 2.BB.10 | Hauchecornite | Ni9BiSbS8 |
| 2.BB.10 | Arsenohauchecornite | Ni18Bi3AsS16 |
| 2.BB.10 | Tellurohauchecornite | Ni9Bi(Te,Bi)S8 |
| 2.BB.10 | Jinxiuite | Ni18Bi2SbAsS16 |
| 2.BB.10 | Bismutohauchecornite | Ni9Bi2S8 |
| 2.BB.10 | Tučekite | Ni9Sb2S8 |
| 2.BB.15 | Shadlunite | (Pb,Cd)(Fe,Cu)8S8 |
| 2.BB.15 | Ferhodsite | (Fe,Rh,Ni,Ir,Cu,Pt)9S8 |
| 2.BB.15 | Cobaltpentlandite | Co9S8 |
| 2.BB.15 | 'UM2002-26-S:FeNi' | (Ni,Fe)9S8 |
| 2.BB.15 | Pentlandite | (NixFey)Σ9S8 |
| 2.BB.15 | Oberthürite | Rh3Ni32S32 |
| 2.BB.15 | Geffroyite | (Cu,Fe,Ag)9(Se,S)8 |
| 2.BB.15 | Kharaelakhite | (Cu,Pt,Pb,Fe,Ni)9S8 |
| 2.BB.15 | 'Manganoshadlunite' | (Mn,Pb,Cd)(Cu,Fe)8S8 |
| 2.BB.15 | Sugakiite | Cu(Fe,Ni)8S8 |
| 2.BB.15 | Godlevskite | (Ni,Fe)9S8 |
| 2.BB.15 | Wangyanite | PdNi8S8 |
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.
Industrial Uses:
Minor silver ore
Internet Links for Argentopentlandite
mindat.org URL:
https://www.mindat.org/min-291.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Argentopentlandite
Reference List:
Taylor, L.A. (1970) The system Ag-Fe-S: Phase equilibria and mineral assemblages. Mineralium Deposita, 5 (1). 41-58 doi:10.1007/bf00207005
Vuorelainen, Y., Hakli, T. A., Papunen, and Heikki (1972) Argentian pentlandite from some Finnish sulfide deposits. American Mineralogist, 57 (1-2) 137-145
Scott, S. D., Gasparrini, E. (1973) Argentian pentlandite, (Fe,Ni)8AgS8, from Bird River, Manitoba. The Canadian Mineralogist, 12 (3) 165-168
Hall, S. R., Stewart, J. M. (1973) The crystal structure of argentian pentlandite (Fe,Ni)8AgS8, compared with the refined structure of pentlandite (Fe,Ni)9S8. The Canadian Mineralogist, 12 (3) 169-177
Localities for Argentopentlandite
Showing 97 localities.
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.
Antarctica | |
| Takahashi et al. (2020) |
Argentina | |
| Paar et al. (2016) |
| Bjerg and Brodtkorb +1 other reference |
Australia | |
| Kalleske (2010) |
| Marshall (2001) +1 other reference |
| Mineralogical Society of America - ... |
Austria | |
| Auer (2025) |
| Melcher et al. (2019) |
| Vavtar (1995) |
Botswana | |
| Maier et al. (2008) |
Bulgaria | |
| Kerestedjian (1997) |
Canada | |
| Manor et al. (2014) |
| Scott et al. (1973) +1 other reference |
| Bernhardt Augsten et al. (1986) +1 other reference |
| Duff (2016) |
| Ames et al. (2003) |
| Ames et al. (2003) | |
| Ames et al. (2003) |
| Ames et al. (2003) |
| Ames et al. (2003) |
| Vale SA |
| Warren (2013) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) |
| Ames et al. (2003) |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) | |
| Ames et al. (2003) |
| 157-158. +1 other reference | |
| Alexandria Minerals Corp. |
| Barkov et al. (2002) |
China | |
| Mineralogical Society of America - ... |
| Zhang Zhengen et al. (1987) |
| [1]许高奇 et al. (1) |
| Yongrui Zhao and Yunqing Zhen (2006) |
| Yongrui Zhao and Yunqing Zhen (2006) | |
| Benhai Li et al. (1991) +1 other reference |
| Chuanjie Pu et al. (2007) |
Czech Republic | |
| Hloušek et al. (2002) |
| Sejkora et al. (2020) |
| Němec |
Ethiopia | |
| Cook et al. (2000) +1 other reference |
Finland | |
| Eilu (2003) |
| Geological Survey of Finland 2008 ... +1 other reference | |
| Alapieti et al. (1986) |
| Kojonen et al. (1991) |
| Geological Survey of Finland 2011. ... |
| Gervilla et al 1997. Mineralogy of ... +1 other reference |
| Pere Tuomas (2009) |
| Mineralogical Society of America - ... |
Greece | |
| Mineralogical Society of America - ... |
Italy | |
| Stara et al. (1999) |
| Benvenuti (1991) |
Japan | |
| Mariko et al (1973) |
Morocco | |
| Ilmen et al. (2022) |
Norway | |
| Sirkka (1988) +1 other reference |
| Bancroft et al. (2001) | |
Poland | |
| a first occurrence in Poland. Mineralogia: 45 (1-2) +2 other references |
| Mederski et al. (2020) |
| a first occurrence in Poland. Mineralogia: 45 (1-2) +1 other reference | |
Russia | |
| Novakov et al. (2021) |
| - (2014) +1 other reference |
| Pekov (1998) | |
| Rudashevskii et al. (1977) +3 other references |
| Goryachev et al. (2008) |
| Groshev +6 other references |
| Ivanov et al. (2020, July) | |
| Mikhailova et al. (2015) +2 other references |
| Karpov S.M. et al. (2012) +2 other references |
| Grokhovskaya et al. (2003) |
| Kalinin (2021) |
| Lobanov et al. (2021, August) |
| Svetlitskaya +2 other references |
| Grishaenko et al. (2007) |
| Barkov et al. (1996) +1 other reference | |
| Rudashevskii et al. (1977) |
| Murzin et al. (2022) |
Serbia | |
| Mineco Limited |
South Africa | |
| Manyeruke (2007) |
| Nikolay Rudashevsky et al (2001) |
Spain | |
| Piña et al. (2008) |
| Mineralogical Society of America - ... +2 other references |
Sweden | |
| Bjärnborg (2009) |
Switzerland | |
| Stalder et al. (1998) |
UK | |
| Mineralogical Magazine 1996 60 : 317-324 |
| Tindle (2008) | |
| Anthony et al. (1990) |
Uruguay | |
| Prichard et al. (2004) |
USA | |
| Heinrich et al. (2004) |
Zimbabwe | |
| Oberthür et al. (2003) |
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Oktyabrsky Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia