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Arsenogoldfieldite

A valid IMA mineral species
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04117410017516251771044.jpg
Arsenogoldfieldite, etc.

Tramway Mine, Butte Mining District, Silver Bow County, Montana, USA
04117410017516251771044.jpg
Arsenogoldfieldite, etc.

Tramway Mine, Butte Mining District, Silver Bow County, Montana, USA
03727860017501879231331.jpg
Arsenogoldfieldite, etc.

Tramway Mine, Butte Mining District, Silver Bow County, Montana, USA
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About ArsenogoldfielditeHide

Formula:
(Cu4Cu2)(Cu4Cu+2)(As2Te2)S12S
Colour:
black
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
4.954 (Calculated)
Crystal System:
Isometric
Name:
Arsenic member of goldfieldite
Originally described as “arsenogoldfieldite” (with quotation marks) from the Pefka mine, Greece, by Voudouris et al. (2022), but published without approval and seemingly either not further followed up as a potential new mineral (from the Greek locality), or trailed the formal description of the US occurrence.

It was later approved as a new species using material from the North Star mine, Mammoth, Tintic district, Juab County, Utah, USA (type material); the Pefka locality is described as a co-type locality in the original description (Sejkora et al., 2025).


Unique IdentifiersHide

Mindat ID:
55709
Long-form identifier:
mindat:1:1:55709:0

IMA Classification of ArsenogoldfielditeHide

IMA status:
Approved
IMA Formula:
Cu1+6Cu1+6(As3+2Te4+2)S2-13
Approval year:
2022
Approval history:
originally published without approval from a Greek locality
Type description reference:
Sejkora, Jiří; Biagioni, Cristian; Dolníček, Zdeněk; Voudouris, Panagiotis (2025) Arsenogoldfieldite, Cu12(As2Te2)∑4S13, a new tetrahedrite-group mineral. Journal of Geosciences, 70 (1). 33-42 doi:10.3190.0034.25

Classification of ArsenogoldfielditeHide

Strunz-mindat (2026):
2.GB.

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S

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

Physical Properties of ArsenogoldfielditeHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Fracture:
Conchoidal
Density:
4.954 g/cm3 (Calculated)

Optical Data of ArsenogoldfielditeHide

Reflectivity:
WavelengthR1 (%)
470nm30.2%
546nm29.9%
589nm29.9%
650nm30.4%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 30.4%.
Colour in reflected light:
grey with a brownish shade
Internal Reflections:
none

Chemistry of ArsenogoldfielditeHide

Mindat Formula:
(Cu4Cu2)(Cu4Cu+2)(As2Te2)S12S
Element Weights:
Element% weight
Cu48.128 %
S26.309 %
Te16.107 %
As9.457 %

Calculated from ideal end-member formula.
Elements listed:
As, Cu, S, Te - search for minerals with similar chemistry

Crystallography of ArsenogoldfielditeHide

Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
I43m
Cell Parameters:
a = 10.2868(4) Å
Unit Cell V:
1,088.53 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Type Occurrence of ArsenogoldfielditeHide

Co-Type Localities:
ⓘ Pefka deposit, Alexandroupoli, Evros, Eastern Macedonia and Thrace, Greece
ⓘ Upper dumps, North Star Mine (Star Consolidated Mine), Mammoth, Tintic Mining District, East Tintic Mountains, Utah, USA
General Appearance of Type Material:
anhedral grains up to 200 × 300 μm in size
Place of Conservation of Type Material:
Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue number P1P 28/2022 (holotype), and the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 20018 (holotype) and 20020 (cotype).
Geological Setting of Type Material:
a Au–Ag–Cu–Pb hydrothermal vein deposit located in contact-metamorphosed dolostone
Associated Minerals at Type Locality:
EnargiteJuabiteNative TelluriumQuartz
Reference:
Sejkora, Jiří; Biagioni, Cristian; Dolníček, Zdeněk; Voudouris, Panagiotis (2025) Arsenogoldfieldite, Cu12(As2Te2)∑4S13, a new tetrahedrite-group mineral. Journal of Geosciences, 70 (1). 33-42 doi:10.3190.0034.25

Synonyms of ArsenogoldfielditeHide

Other Language Names for ArsenogoldfielditeHide

Relationship of Arsenogoldfieldite to other SpeciesHide

Member of:
Goldfieldite Subgroup > Tetrahedrite Group
Other Members of Goldfieldite Subgroup:
Goldfieldite(Cu4◻2)(Cu4Cu+2)Te4S12SIso. 43m : I43m
Stibiogoldfieldite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)S12SIso. 43m : I43m

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Arsenogoldfieldite associated with ColusiteCu13VAs3S16
1 photo of Arsenogoldfieldite associated with ZincospiroffiteZn2Te4+3O8
1 photo of Arsenogoldfieldite associated with BodieiteBi2(TeO3)2(SO4)
1 photo of Arsenogoldfieldite associated with QuartzSiO2
1 photo of Arsenogoldfieldite associated with AdanitePb2(Te4+O3)(SO4)

Related Minerals - Strunz-mindat GroupingHide

2.GB.'Polybasite-Tac'[Ag6Sb2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
2.GB.Kenoargentotetrahedrite-(Zn)[Ag6]4+(Cu4Zn2)Sb4S12◻Iso. 43m : I43m
2.GB.Argentotetrahedrite-(Hg)Ag6(Cu4Hg2)Sb4S12SIso. 43m : I43m
2.GB.Annivite-(Zn)Cu6(Cu4Zn2)Bi4S12SIso. 43m : I43m
2.GB.Pošepnýite(Cu+3◻3)(Hg2+4Cu+2)Sb4Se12(Se0.5◻0.5)Iso. 43m : I43m
2.GB.Tennantite-(Cu)Cu6(Cu4Cu2)As4S12SIso. 43m : I43m
2.GB.Argentopolybasite[Ag6Sb2S7][Ag9AgS4]Trig. 32 : P321
2.GB.Tennantite-(Mn)Cu6(Cu4Mn2)As4S12SIso. 43m : I43m
2.GB.Argentotetrahedrite-(Cd)Ag6(Cu4Cd2)Sb4S12SIso. 43m : I43m
2.GB.Stibioústalečite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)Se12SeIso. 43m : I43m
2.GB.Stibiogoldfieldite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)S12SIso. 43m : I43m
2.GB.Argentotetrahedrite-(Zn)Ag6(Cu4Zn2)Sb4S12SIso. 43m : I43m
2.GB.Tetrahedrite-(Cd)Cu6(Cu4Cd2)Sb4S12SIso. 43m : I43m
2.GB.Arsenoústalečite(Cu4Cu2)(Cu4Cu+2)(As2Te2)Se12SeIso. 43m : I43m
2.GB.Tennantite-(In)Cu6(Cu5In)As4S13Iso. 43m : I43m
2.GB.Zvěstovite-(Fe)Ag6(Ag4Fe2+2)As4S12SIso. 43m : I43m
2.GB.Hakite-(Fe)Cu6(Cu4Fe2+2)Sb4Se12SeIso. 43m : I43m
2.GB.Tennantite-(Cd)Cu6(Cu4Cd2)As4S12SIso. 43m : I43m
2.GB.XKenorozhdestvenskayaite-(Fe)[Ag6]4+(Ag4Fe2+2)Sb4S12◻Iso. 43m : I43m
2.GB.Tetrahedrite-(Cu)Cu6(Cu4Cu2+2)Sb4S12SIso. 43m : I43m
2.GB.Hakite-(Zn)Cu6(Cu4Zn2)Sb4Se12SeIso. 43m : I43m
2.GB.Zvěstovite-(Zn)Ag6(Ag4Zn2)As4S12SIso.
2.GB.Hakite-(Cd)Cu6(Cu4Cd2)Sb4Se12SeIso. 43m : I43m
2.GB.Kenoargentotennantite-(Fe)[Ag6]4+(Cu4Fe2)As4S12◻Iso. 43m : I43m
2.GB.Tennantite-(Hg)Cu6(Cu4Hg2)As4S12SIso. 43m : I43m
2.GB.Tetrahedrite-(Mn)Cu6(Cu4Mn2)Sb4S12SIso. 43m : I43m
2.GB.Tennantite-(Ni)Cu6(Cu4Ni2)As4S12SIso. 43m : I43m
2.GB.Tetrahedrite-(Ni)Cu6(Cu4Ni2)Sb4S12SIso. 43m : I43m
2.GB.05Hakite-(Hg)Cu6(Cu4Hg2)Sb4Se12SeIso. 43m : I43m
2.GB.05Rozhdestvenskayaite-(Zn)Ag6(Ag4Zn2)Sb4S12SIso. 43m : I43m
2.GB.05Argentotennantite-(Zn)Ag6(Cu4Zn2)As4S12SIso. 43m : I43m
2.GB.05Argentotennantite-(Fe)Ag6(Cu4Fe2)As4S12SIso. 43m : I43m
2.GB.05Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1Iso. 43m : I43m
2.GB.05Tennantite SubgroupCu6(Cu4C2+2)As4S12SIso. 43m : I43m
2.GB.05Tennantite-(Zn)Cu6(Cu4Zn2)As4S12SIso. 43m : I43m
2.GB.05Tetrahedrite-(Zn)Cu6(Cu4Zn2)Sb4S12SIso. 43m : F43m
2.GB.05Tetrahedrite SubgroupCu6(Cu4C2+2)Sb4S12SIso. 43m : I43m
2.GB.05Tennantite-(Fe)Cu6(Cu4Fe2+2)As4S12SIso. 43m : I43m
2.GB.05Tetrahedrite-(Fe)Cu6(Cu4Fe2+2)Sb4S12SIso. 43m : I43m
2.GB.05Tetrahedrite-(Hg)Cu6(Cu4Hg2)Sb4S12SIso. 43m : I43m
2.GB.05Kenoargentotetrahedrite-(Fe)[Ag6]4+(Cu4Fe2+2)Sb4S12◻Iso. 43m : I43m
2.GB.05Giraudite-(Zn)Cu6(Cu4Zn2)As4Se12SeIso. 43m : I43m
2.GB.05Argentotetrahedrite-(Fe)Ag6(Cu4Fe2)Sb4S12SIso. 43m : I43m
2.GB.05Goldfieldite(Cu4◻2)(Cu4Cu+2)Te4S12SIso. 43m : I43m
2.GB.05'UM1992-21-S:AgFeSb'Ag6(Ag4Fe2+2)Sb4S12SIso.
2.GB.10SelenostephaniteAg5SbSe4Orth. 222 : P212121
2.GB.10StephaniteAg5SbS4Orth. mm2 : Cmc21
2.GB.15'UM2003-14-S:AgBiFeTe'Ag16FeBiTe3S8
2.GB.15'UM1979-17-S:BiCuFe'~Cu18Fe4BiS16
2.GB.15Pearceite[Ag6As2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
2.GB.15ArgentopearceiteAg16As2S11Trig. 32 : P321
2.GB.15Cupropolybasite[Cu6Sb2S7][Ag9CuS4]Trig. 3m : P31m
2.GB.15Fengruiite[Ag6Sb2S7][Ag9CuS2Te2]Trig. 3m(32/m) : P3m1
2.GB.15Auropearceite [Ag9AuS4][Ag6As2S7]Trig. 32 : P321
2.GB.15Selenopolybasite[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]Trig. 3m(32/m) : P3m1
2.GB.15Polybasite[Ag6Sb2S7][Ag9CuS4]Mon. 2/m : B2/m
2.GB.15Auropolybasite[Ag9AuS4][Ag6Sb2S7]Trig. 32 : P321
2.GB.15Cupropearceite[Cu6As2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
2.GB.20Vorontsovite(Hg5Cu)Σ6TlAs4S12Iso. 43m : I43m
2.GB.20Ferrovorontsovite(Fe5Cu)Σ6TlAs4S12Iso. 43m : I43m
2.GB.20Galkhaite(Hg5Cu)CsAs4S12Iso. 43m : I43m

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 ArsenogoldfielditeHide

References for ArsenogoldfielditeHide

Localities for ArsenogoldfielditeHide

Showing 13 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.
Argentina
 
  • Catamarca Province
    • Andalgalá Department
      • Andalgalá
Sejkora et al. (2025)
Greece (TL)
 
  • Eastern Macedonia and Thrace
    • Evros
      • Alexandroupoli
Voudouris et al. (2022) +1 other reference
Sejkora et al. (2025)
Japan
 
  • Kagoshima Prefecture
    • Satsumasendai City
      • Iriki
Sejkora et al. (2025)
  • Kochi Prefecture
    • Tosa District
Sejkora et al. (2025)
  • Shizuoka Prefecture
    • Shimoda City
      • Rendaiji
Sejkora et al. (2025)
Philippines
 
  • Luzon
    • Cordillera Administrative Region
      • Ifugao Province
Sejkora et al. (2025)
Russia
 
  • Kamchatka Krai
    • Koryak Okrug
      • Karaginsky District
Sejkora et al. (2025)
Sejkora et al. (2025)
  • Khabarovsk Krai
    • Okhotsky District
      • Svetloye epithermal district
Tamara Yu. Yakich * et al. (2024) +1 other reference
USA
 
  • Montana
    • Silver Bow County
      • Butte Mining District (Summit Valley Mining District)
Matthias Boehringer collection +1 other reference
  • Nevada
    • Esmeralda County
      • Goldfield Mining District
        • Goldfield
Sejkora et al. (2025)
  • Utah
    • East Tintic Mountains
      • Tintic Mining District
        • Mammoth
          • North Star Mine (Star Consolidated Mine)
Sejkora et al. (2025)
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