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Eucairite

A valid IMA mineral species - grandfathered

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Photos of Eucairite (38)Discuss Eucairite

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Edit Eucairite Add Synonym Edit CIF structures Clear Cache

Eucairite, etc.

Předbořice deposit, Předbořice, Kovářov, Písek District, South Bohemian Region, Czech Republic

Eucairite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany

Eucairite

Předbořice deposit, Předbořice, Kovářov, Písek District, South Bohemian Region, Czech Republic

Eucairite, etc.

Předbořice deposit, Předbořice, Kovářov, Písek District, South Bohemian Region, Czech Republic

Eucairite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany

Eucairite

Předbořice deposit, Předbořice, Kovářov, Písek District, South Bohemian Region, Czech Republic

Eucairite, etc.

Předbořice deposit, Předbořice, Kovářov, Písek District, South Bohemian Region, Czech Republic

Eucairite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany

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About EucairiteHide

Formula:

AgCuSe

Colour:

Brilliant creamy white

Lustre:

Metallic

Hardness:

2½

Specific Gravity:

7.6 - 7.8

Crystal System:

Orthorhombic

Name:

For the Greek for opportunity, since it was first found shortly after the description of selenium.

Type Locality:

ⓘ Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden

This page provides mineralogical data about Eucairite.

Unique IdentifiersHide

Mindat ID:

1415

Long-form identifier:

mindat:1:1:1415:7

Similar NamesHide

Eckerite	A valid IMA mineral species	Ag₂CuAsS₃
Eckrite	A synonym of Winchite
Eucrite	A synonym of 'Eucrite meteorite'
Eucroite	A synonym of Euchroite

IMA Classification of EucairiteHide

IMA status:

Approved, 'Grandfathered' (first described prior to 1959)

IMA Formula:

CuAgSe

Type description reference:

Berzelius, J. (1818) III. Undersökning af några föreningar, som bero af svagare frändskaper 12. Undersökning om fórekommandet af selenium i mineralriket [III. Investigation of some compounds which are due to weaker affinities 12. Investigation of the occurrence of selenium in the mineral kingdom]. Afhandlingar i fysik, kemi och mineralogi [Treatises in physics, chemistry and mineralogy], 6. p.134-144.

Classification of EucairiteHide

Strunz-mindat (2026):

2.BA.50

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au

Dana 8th ed.:

2.4.6.2

2 : SULFIDES
4 : A_mB_nX_p, with (m+n):p = 2:1

Hey's CIM Ref.:

3.2.13

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 SymbolsHide

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.

Symbol	Source	Reference for Standard
Eca	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Euc	The Canadian Mineralogist (2019)	The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of EucairiteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Brilliant creamy white

Comment:

Tarnishes to bright orange

Streak:

Shining

Hardness:

2½ on Mohs scale

Hardness:

VHN₂₅=27 - 31 kg/mm² - Vickers

Tenacity:

Brittle

Fracture:

Irregular/Uneven, Conchoidal

Comment:

Somewhat sectile

Density:

7.6 - 7.8 g/cm³ (Measured) 7.91 g/cm³ (Calculated)

Optical Data of EucairiteHide

Anisotropism:

Strong olive-brown to steel-blue with a purplish tinge

Colour in reflected light:

Tin-white with faint creamy tinge

Pleochroism:

Weak

Chemistry of EucairiteHide

Mindat Formula:

AgCuSe

Element Weights:

Element	% weight
Ag	43.083 %
Se	31.537 %
Cu	25.380 %

Calculated from ideal end-member formula.

Elements listed:

Ag, Cu, Se - search for minerals with similar chemistry

Crystallography of EucairiteHide

Crystal System:

Orthorhombic

Cell Parameters:

a = 4.105 Å, b = 4.07 Å, c = 6.31 Å

Ratio:

a:b:c = 1.009 : 1 : 1.55

Unit Cell V:

105.42 Å³ (Calculated from Unit Cell)

Morphology:

Granular masses and blebs

Comment:

Orthorhombic, pseudotetragonal. Point Group: 4/m 2/m 2/m ;Space Group: P4/nmm.

Crystal StructureHide

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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)
0010579	Eucairite	Frueh A J, Czamanske G K, Knight C (1957) The crystallography of eucairite, CuAgSe Zeitschrift fur Kristallographie 108 389-396		1957	Skrikerum, Sweden	0	293
0010578	Eucairite	Frueh A J, Czamanske G K, Knight C (1957) The crystallography of eucairite, CuAgSe Zeitschrift fur Kristallographie 108 389-396		1957	Skrikerum, Sweden	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Eucairite'
loop_
_publ_author_name
'Frueh A J'
'Czamanske G K'
'Knight C'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 108 
_journal_year 1957
_journal_page_first 389
_journal_page_last 396
_publ_section_title
;
 The crystallography of eucairite, CuAgSe
 Sample: tetragonal subcell
;
_database_code_amcsd 0010579
_chemical_compound_source 'Skrikerum, Sweden'
_chemical_formula_sum 'Cu Ag Se'
_cell_length_a 4.083
_cell_length_b 4.083
_cell_length_c 6.31
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 105.193
_exptl_crystal_density_diffrn      7.905
_symmetry_space_group_name_H-M 'P 4/n m m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-y,1/2-x,z'
  '1/2+y,1/2+x,-z'
  '1/2+y,-x,-z'
  '1/2-y,x,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2+x,1/2+y,-z'
  '1/2-x,1/2-y,z'
  'y,x,z'
  '-y,-x,-z'
  '-y,1/2+x,-z'
  'y,1/2-x,z'
  '1/2-x,y,z'
  '1/2+x,-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Cu   0.25000   0.75000   0.10500   0.50000
Ag   0.25000   0.25000   0.44900   1.00000
Se   0.25000   0.25000   0.87300   1.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.12 Å	(10)
2.61 Å	(7)
2.88 Å	(5)
2.48 Å	(4)
2.02 Å	(2)
3.14 Å	(1)
1.861 Å	(1)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Geological Setting:

Hydrothermal deposits

Type Occurrence of EucairiteHide

Type Locality:

ⓘ Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden

Reference:

Synonyms of EucairiteHide

Berzelinite

Other Language Names for EucairiteHide

Dutch:Eucairiet

French:Cuivre Sélénié Argental

German:Eucairit
Berzelinit
Eukairit
Selenkupfersilber

Norwegian:Eukairite

Russian:Эвкайрит

Simplified Chinese:硒铜银矿

Spanish:Berzelinita
Eucairita

Traditional Chinese:硒銅銀礦

Common AssociatesHide

Associations Based on Photo Data:

79 photos of Eucairite associated with Clausthalite	PbSe
61 photos of Eucairite associated with Calcite	CaCO₃
57 photos of Eucairite associated with Klockmannite	CuSe
55 photos of Eucairite associated with Umangite	Cu₃Se₂
45 photos of Eucairite associated with Berzelianite	Cu_2-xSe (x ≈ 0.12)
29 photos of Eucairite associated with 'Thucholite'
20 photos of Eucairite associated with Crookesite	Cu₇(Tl, Ag)Se₄
19 photos of Eucairite associated with Naumannite	Ag₂Se
15 photos of Eucairite associated with Hematite	Fe₂O₃
12 photos of Eucairite associated with Tiemannite	HgSe

Related Minerals - Strunz-mindat Grouping Hide

2.BA.	Makotoite	Ag₁₂(Cu₃Au)S₈	Trig. 3m(32/m) : R3c
2.BA.	Alburnite	Ag₈GeTe₂S₄	Iso.
2.BA.	Dzierżanowskite	CaCu₂S₂	Trig. 3m(32/m) : P3m1
2.BA.	Xuwenyuanite	Ag₉Fe³⁺Te₂S₄	Iso. 43m : F43m
2.BA.	'Orileyite'	(Fe,Cu)₂As
2.BA.	Juxingite	Bi₆Cu⁺₁₃₈Cu²⁺₂Fe³⁺₃₀S₁₂₅	Iso. 43m : F43m
2.BA.05	Djurleite	Cu₃₁S₁₆	Mon. 2/m
2.BA.05	Geerite	Cu₈S₅	Trig. 3
2.BA.05	Roxbyite	Cu₅₈S₃₂	Tric. 1 : P1
2.BA.05	Chalcocite	Cu₂S	Mon. 2/m : P2₁/b
2.BA.10	Digenite	Cu₉S₅	Trig. 3m(32/m) : R3m
2.BA.10	Anilite	Cu₇S₄	Orth. mmm(2/m2/m2/m) : Pnma
2.BA.15	Bornite	Cu₅FeS₄	Orth. mmm(2/m2/m2/m) : Pbca
2.BA.20	Bellidoite	Cu₂Se	Tet. 4/m : P4₂/n
2.BA.20	Berzelianite	Cu_2-xSe (x ≈ 0.12)	Iso. m3m(4/m32/m) : Fm3m
2.BA.25	Athabascaite	Cu₅Se₄	Orth.
2.BA.25	Umangite	Cu₃Se₂	Tet. 42m : P42₁m
2.BA.30	Rickardite	Cu₇Te₅	Orth. mmm(2/m2/m2/m) : Pmmn
2.BA.30	Weissite	Cu_2-xTe	Hex. 6/mmm(6/m2/m2/m) : P6/mmm
2.BA.35	Acanthite	Ag₂S	Mon. 2/m : P2₁/m
2.BA.35	Spryite	Ag₈(As³⁺_0.5As⁵⁺_0.5)S₆	Orth. mm2 : Pna2₁
2.BA.40d	'UM2003-13-S:AgAuCu'	Ag₆AuCu₂S₅
2.BA.40	Mckinstryite	Ag_5-xCu_3+xS₄	Orth. mmm(2/m2/m2/m) : Pnma
2.BA.40	Stromeyerite	AgCuS	Orth. mmm(2/m2/m2/m)
2.BA.42	Honeaite	Au₃TlTe₂	Orth. mmm(2/m2/m2/m) : Pbcm
2.BA.45	Jalpaite	Ag₃CuS₂	Tet. 4/mmm(4/m2/m2/m) : I4₁/amd
2.BA.45	Selenojalpaite	Ag₃CuSe₂	Tet. 4/mmm(4/m2/m2/m) : I4₁/amd
2.BA.45	Kurilite	Ag₈Te₃Se	Trig. 3 : R3
2.BA.47	Spiridonovite	(Cu_1-xAg_x)₂Te	Trig. 3m(32/m) : P3c1
2.BA.50	Wuyanzhiite	Cu₂S	Tet. 422 : P4₃2₁2
2.BA.52	'Argentite'	Ag₂S	Iso.
2.BA.55	Naumannite	Ag₂Se	Orth. 222 : P2₁2₁2₁
2.BA.55	Aguilarite	Ag₄SeS	Mon. 2/m
2.BA.60	Chenguodaite	Ag₉Fe³⁺Te₂S₄	Orth.
2.BA.60	Hessite	Ag₂Te	Mon. 2/m : P2₁/b
2.BA.60	Cervelleite	Ag₄TeS	Mon. 2/m
2.BA.65	Henryite	(Cu,Ag)_3+xTe₂ , with x ~ 0.40	Iso. m3m(4/m32/m) : Fd3c
2.BA.65	Stützite	Ag_5-xTe₃, x = 0.24-0.36	Hex. 6 : P6
2.BA.70	Argyrodite	Ag₈GeS₆	Orth. mm2 : Pna2₁
2.BA.70	Putzite	(Cu_4.7Ag_3.3)GeS₆	Iso. 43m : F43m
2.BA.70	Canfieldite	Ag₈SnS₆	Orth. mm2 : Pna2₁
2.BA.75	Fischesserite	Ag₃AuSe₂	Iso. 432 : I4₁32
2.BA.75	Uytenbogaardtite	Ag₃AuS₂	Trig. 3m(32/m) : R3c
2.BA.75	Penzhinite	(Ag,Cu)₄Au(S,Se)₄	Hex. 622 : P6₃22
2.BA.75	Petrovskaite	AuAgS	Mon.
2.BA.75	Petzite	Ag₃AuTe₂	Iso. 432 : I4₁32
2.BA.80	Bezsmertnovite	(Au,Ag)₄Cu(Te,Pb)	Orth.
2.BA.80	Bilibinskite	PbCu₂Au₃Te₂	Iso.
2.BA.80	Bogdanovite	(Au,Te,Pb)₃(Cu,Fe)	Iso.

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 EucairiteHide

mindat.org URL:

https://www.mindat.org/min-1415.html
Please feel free to link to this page.

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External Links:

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Look for Eucairite on Wikipedia

Look for Eucairite 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:

Buy from D. Joyce minerals

References for EucairiteHide

Reference List:

Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.pp.183-184

Borchert, Werner; Patzak, Ingeborg (1954) Reaktionen im festen Zustand von Kupfer und Silber mit Selen. Heidelberger Beiträge zur Mineralogie und Petrographie, 4 (5). 434-442 doi:10.1007/bf01136987

Frueh, A. J.; Czamanske, G. K.; Knight, Ch. (1957) The crystallography of eucairite, CuAgSe. Zeitschrift für Kristallographie, 108 (5-6). 389-396 doi:10.1524/zkri.1957.108.5-6.389

(2005) Eucairite. Handbook of Mineralogy. Mineralogical Society of America

Localities for EucairiteHide

Showing 69 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
La Rioja Province Capital Department Puerto Alegre ⓘ San Francisco deposit	Zappettini et al. (2014) +1 other reference
Chilecito department Sañogasta ⓘ La Piedra Pintada	Brodtkorb (2002)
ⓘ Santa Brígida mine	Zappettini et al. (2014) +1 other reference
General Lamadrid department ⓘ El Chire prospect	Zappettini et al. (2014) +1 other reference
ⓘ Rincón Blanco	Márquez-Zavalía et al. (2021)
Villa Castelli ⓘ Sierra de Cacho	Simon et al. (1997)
ⓘ El Hoyo mine	Guerrero (1969)
ⓘ El Tolar deposit	de Brodtkorb et al. (2010)
ⓘ Las Asperezas mine	Paar et al. (2005, January) +2 other references
ⓘ Las Pichanas deposit	Milka K. de BRODTKORB and Sabrina CROSTA (2010)
ⓘ Tumiñico Mine	Paar et al. (2002) +1 other reference
ⓘ ~~Sierra de Umango~~	Simon et al. (1997)
ⓘ Los Llantenes mining district	de Brodtkorb +4 other references
ⓘ Sierra de Famatina
Vinchina Department Jagüé ⓘ San Pedro mine	Grundmann et al. (2018)
Mendoza Province Luján de Cuyo department Cacheuta District ⓘ Sierra de Cacheuta	Simon et al. (1997) +1 other reference
Cerro de Cacheuta ⓘ Cacheuta Mine	Dana 6:53. +1 other reference

Australia
Queensland Cook Shire ⓘ Dianne Mine	Segnit +1 other reference
South Australia Pastoral Unincorporated Area Iron Knob ⓘ Iron Monarch Main Pit	Sorrell (n.d.)
Western Australia Kalgoorlie-Boulder Shire Kalgoorlie-Boulder Kalgoorlie Consolidated Gold Mines ⓘ Great Boulder Gold Mine (Phantom Lode; Great Boulder South; Great Boulder North; Great Boulder Extended)	Simon et al. (1997)

Bulgaria
Sofia Province Chelopech Municipality ⓘ Chelopech Au-Cu Mine	Terziev (1966) +1 other reference
Etropole Municipality ⓘ Elatsite Mine	Singer et al. (2008) +1 other reference

Canada
Nunavut Kivalliq Region Baker Lake ⓘ Christopher Island	G.S.C. Bulletin 330. +1 other reference
Ontario Cochrane District Timmins Kidd Township ⓘ Kidd Mine	Kidd Operations
Saskatchewan Beaverlodge Lake area ⓘ Eagle Claims U-Cu-Se occurrence	Harris et al. (1971)
ⓘ Martin Lake mine	Harris et al. (1971) +2 other references

Chile
Atacama Chañaral Province Salitrosa-Porvenir mining district ⓘ Flamenco mine	Picot et al. (1982)

China
Sichuan Liangshan Yi Huili County ⓘ Luchang-Datongchang Ag-Cu deposit	Zhi Li et al. (1973) +2 other references

Czech Republic
Central Bohemian Region ⓘ Příbram District	Škácha et al. (2017)
Příbram Bytíz ⓘ Uranium Mine No. 11A (Shaft No. 11A)	Škácha (2015)
Karlovy Vary Region Karlovy Vary District ⓘ Jáchymov	Anthony et al. (1990)
Olomouc Region Jeseník District Javorník Zálesí ⓘ Zálesí uranium deposit	Sejkora et al. (2014)
Plzeň Region Klatovy District Nalžovské Hory Ústaleč ⓘ Ústaleč U occurrence (Austaletz U occurrence)	Sejkora et al. (2022) +1 other reference
Tachov District Zadní Chodov ⓘ Zadní Chodov deposit (Hinterkotten deposit)	Scharmová et al. (1995)
South Bohemian Region Písek District Kovářov Předbořice ⓘ Předbořice deposit	Simon et al. (1997) +1 other reference
South Moravian Region Brno-Country District ⓘ Tišnovská Nová Ves	Šouba
Vysočina Region Žďár nad Sázavou District Nové Město na Moravě ⓘ Petrovice	Kvaček (1979) +1 other reference
ⓘ Slavkovice	Kvaček (1979) +1 other reference
Rožná Rožná deposit ⓘ Bukov Mine	Vavřín (1994) +1 other reference
ⓘ Habři Mine	Kvaček (1979) +1 other reference

France
Auvergne-Rhône-Alpes Puy-de-Dôme Issoire Le Vernet-Chaméane ⓘ Chaméane Uranium Deposit	Simon et al. (1997)

Germany
Baden-Württemberg Freiburg Region Ortenaukreis Oberwolfach ⓘ Clara Mine	Draxler et al. (11/2025)
Brandenburg Spree-Neiße Spremberg ⓘ Spremberg-Graustein-Schleife deposit (Spremberg-Graustein Cu deposit)	Kopp et al. (2012)
Hesse Darmstadt Darmstadt-Dieburg Mühltal Nieder-Ramstadt ⓘ Wingertsberg Quarry	Belendorff (2021)
Lower Saxony Goslar District Braunlage St Andreasberg ⓘ Roter Bär Mine	Wittern (2001)
Harz (Landkreis Goslar) ⓘ Trogtal Quarries	Weiß (1990)
Göttingen District Osterode am Harz Lerbach ⓘ Weintraube Mine	Weiß (1990)
Walkenried Zorge ⓘ Brummerjan Mine	Dr. Günter Grundmann collection
Saxony-Anhalt Harz Ballenstedt Rieder ⓘ Greywacke quarry ?	Schaarschmidt (2007) +1 other reference
Mansfeld-Südharz Mansfeld ⓘ Tilkerode mining district	Wittern (2001)
Saxony Erzgebirgskreis Aue-Bad Schlema ⓘ Alberoda	Förster (2004) +2 other references
Zwickau District Hartenstein ⓘ Shaft 371	Forster et al. (2003)

Greenland
Kujalleq Qaqortoq ⓘ Frederik VII's Mine	Anthony et al. (1990) +1 other reference

Middle East
ⓘ Hatrurim Formation	Vapnik et al. (2014)

Norway
Buskerud Kongsberg Underberget Mining Field ⓘ Hellig Trefoldighet Mine	Pavel M. Kartashov analytical data (2005)

Poland
Lower Silesian Voivodeship Kłodzko County Gmina Stronie Śląskie ⓘ Kletno	Anthony et al. (1990)
Wrocław County Gmina Sobótka Nasławice ⓘ Serpentinite quarry	Galuskin et al. (2003)

Romania
Hunedoara County Certeju de Sus ⓘ Săcărâmb	www.minerals-of-the-carpathians +1 other reference

Sweden (TL)
Östergötland County Valdemarsvik ⓘ Skrikerum Mine (TL)	Berzelius (1818) +4 other references

UK
England Devon Torbay Torquay ⓘ Hope's Nose	Stanley et al. (1990) +1 other reference

USA
Colorado Montrose County Paradox Valley ⓘ Dolores River	Eckel et al. (1997)
San Miguel County ⓘ Cougar Mine	Eckel et al. (1997) +1 other reference
Idaho Owyhee County De Lamar Mining District ⓘ De Lamar Mine	Collins (2012)
Nevada Clark County Spring Mountains Goodsprings Mining District ⓘ Azurite Mine	Castor et al. (2004)
Elko County Gold Circle Mining District (Midas Mining District) ⓘ Ken Snyder Mine (Midas Mine)	Castor et al. (2004)
ⓘ Midas Mine (Reco Mine; Big Chief group; King Midas claim; Dixie claim)	Tharalson +5 other references
Humboldt County Sulphur Mining District Sulphur ⓘ Hycroft Mine	Castor et al. (2004)
Utah San Juan County La Sal Creek Mining District ⓘ Gray Daun Mine	Carter et al. (1965) +1 other reference

Uzbekistan
Navoiy Central Kyzylkum Region Bel'tau Mountains ⓘ Vysokovol'tnoye Ag-Au deposit (Vysokovoltnoye)	Koneev et al. (2005)

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Eucairite

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