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Eucairite

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Skrikerum Mine, Valdemarsvik, Östergötland, Sweden
© B. Otter

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Formula:
AgCuSe
System:OrthorhombicHardness:2½
This page provides mineralogical data about Eucairite.

Classification of Eucairite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/B.06-40
Nickel-Strunz 10th (pending) edition ID: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 edition ID:2.4.6.2

2 : SULFIDES
4 : AmBnXp, 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
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Type Occurrence of Eucairite

Type Locality:Skrikerum Mine, Valdemarsvik, Östergötland, Sweden
Year of Discovery:1818

Physical Properties of Eucairite

Hardness (Mohs):2½

Crystallography of Eucairite

Crystal System:Orthorhombic
Cell Parameters:a = 4.1Å, b = 4.07Å, c = 6.31Å
Ratio:a:b:c = 1.007 : 1 : 1.55
Unit Cell Volume:V 105.29 ų (Calculated from Unit Cell)

Chemical Properties of Eucairite

Formula:
AgCuSe
Essential elements:Ag, Cu, Se
All elements listed in formula:Ag, Cu, Se

Relationship of Eucairite to other Species

Related Minerals - Nickel-Strunz Grouping):
2.BA.05Chalcocite
Cu
 
2
S
2.BA.05Djurleite
Cu
 
31
S
 
16
2.BA.05Geerite
Cu
 
8
S
 
5
2.BA.05Roxbyite
Cu
 
9
S
 
5
2.BA.10Anilite
Cu
 
7
S
 
4
2.BA.10Digenite
Cu
 
9
S
 
5
2.BA.15Bornite
Cu
 
5
FeS
 
4
2.BA.20Bellidoite
Cu
 
2
Se
2.BA.20Berzelianite
Cu
 
2
Se
2.BA.25Athabascaite
Cu
 
5
Se
 
4
2.BA.25Umangite
Cu
 
3
Se
 
2
2.BA.30Rickardite
Cu
 
7
Te
 
5
2.BA.30Weissite
Cu
 
2-x
Te
2.BA.35Acanthite
Ag
 
2
S
2.BA.35Argentite
2.BA.40Mckinstryite
(Ag,Cu)
 
2
S
2.BA.40Stromeyerite
AgCuS
2.BA.45Jalpaite
Ag
 
3
CuS
 
2
2.BA.45Selenojalpaite
Ag
 
3
CuSe
 
2
2.BA.55Aguilarite
Ag
 
4
SeS
2.BA.55Naumannite
Ag
 
2
Se
2.BA.60Cervelleite
Ag
 
4
TeS
2.BA.60Hessite
Ag
 
2
Te
2.BA.65Henryite
Ag
 
3
Cu
 
4
Te
 
4
2.BA.65Stützite
Ag
 
7
Te
 
4
2.BA.70Argyrodite
Ag
 
8
GeS
 
6
2.BA.70Canfieldite
Ag
 
8
(Sn,Ge)(S,Te)
 
6
2.BA.70Putzite
(Cu
 
4.7
Ag
 
3.3
)GeS
 
6
2.BA.75Fischesserite
Ag
 
3
AuSe
 
2
2.BA.75Penzhinite
(Ag,Cu)
 
4
Au(S,Se)
 
4
2.BA.75Petrovskaite
AuAg(S,Se)
2.BA.75Petzite
Ag
 
3
AuTe
 
2
2.BA.75Uytenbogaardtite
Ag
 
3
AuS
 
2
2.BA.80Bezsmertnovite
(Au,Ag)
 
4
Cu(Te,Pb)
2.BA.80Bilibinskite
PbCuAu
 
3
Te
 
2
2.BA.80Bogdanovite
(Au,Te,Pb)
 
3
(Cu,Fe)
Related Minerals - Hey's Index Grouping:
3.2.1Acanthite
Ag
 
2
S
3.2.3Naumannite
Ag
 
2
Se
3.2.4Aguilarite
Ag
 
4
SeS
3.2.5Hessite
Ag
 
2
Te
3.2.6Empressite
AgTe
3.2.7Stützite
Ag
 
7
Te
 
4
3.2.8Cervelleite
Ag
 
4
TeS
3.2.9Dervillite
Ag
 
2
AsS
 
2
3.2.10Stromeyerite
AgCuS
3.2.11Mckinstryite
(Ag,Cu)
 
2
S
3.2.12Jalpaite
Ag
 
3
CuS
 
2
3.2.14Cameronite
AgCu
 
7
Te
 
10
3.2.15Henryite
Ag
 
3
Cu
 
4
Te
 
4
3.2.16Sternbergite
AgFe
 
2
S
 
3
3.2.17Argentopyrite
AgFe
 
2
S
 
3
3.2.18Geffroyite
(Cu,Fe,Ag)
 
9
(Se,S)
 
8
3.2.19Argentopentlandite
Ag(Fe,Ni)
 
8
S
 
8

Other Names for Eucairite

Synonyms:
Berzelinite
French names:
Cuivre Sélénié Argental
German names:
BerzelinitEucairitEukairitSelenkupfersilber
Russian names:
Эвкайрит
Spanish names:
BerzelinitaEucairita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Eucairite

Reference List:Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 183-184.

Zeitschrift für Kristallographie: 108: 389-391.

Internet Links for Eucairite

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  • Look for Eucairite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Eucairite in the Natural History Museum (London) online catalogue
  • Eucairite details from Handbook of Mineralogy (PDF)
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    Localities for Eucairite

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    The 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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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Argentina
     
    • La Rioja
      • Famatina
        • Puerto Alegre
    		Paar, et al. (1996): Revista de la Asociacion Geologica Argentina 51 (4):304-312
      • Jagué
    		Can. Min. Vol. 42, 1745-1755 (2004).
    Recursos Minerales de la Republica Argentina, E. O. Zappettini Ed., Buenos Aires 1999 ISSN 0328-2325
      • Sañogasta District
    		M.K. de Brodtkorb (ed.) (2002) Las Especies Minerales de la Republica Argentina, (Asociacion Mineralogica Argentina)
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    No reference listed
    No reference listed
        • Sierra de Cacho
    • Mendoza
      • Sierra de Cacheuta
        • Cerro de Cacheuta
    		Dana 6:53.
    Australia
     
    • South Australia
      • Eyre peninsula
        • Middleback Range
          • Iron Knob
    		www.crocoite.com (Steve Sorrell) and refs therein
    Bulgaria
     
    • Pazardzhik (Pazardjik) Oblast
      • Srednogorie (Sredna Gora; Srdnia Gora) Region
        • Panagyurishte (Panagurishte) Obshchina
          • Chelopech
    		American Mineralogist (1966): 51: 29-36
    Canada
     
    • Ontario
      • Cochrane District
        • Kidd Township
          • Timmins
    		ontariominerals.com
    • Saskatchewan
      • Beaverlodge Region
        • Lake Athabasca
          • Uranium City
    		Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Chile
     
    • Atacama Region
      • Chañaral Province
    		Atlas of Ore Minerals, Picot and Johan (1982)
    China
     
    • Sichuan Province
      • Liangshan Autonomous Prefecture
        • Huili Co.
    		Zhang Suhua et al. (1997): Chinese Journal of Nonferrous Metals 7(2), 11-16.; Dong Zhensheng et al. (1996). In: Tu Guangzhi, Ed.: Low Temperature Geochemistry, Science Press (Beijing), 32-42.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Ostrov
    		Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
      • Plzeň Region
        • Planá
    		Scharmová, M., Scharm, B.: Minerály selenu na uranovém ložisku Zadní Chodov. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 43-47.
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Nové Město na Moravě
    		Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38.
    Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38.
        • Rožná deposit
    		Vavřín, I.: Nové poznatky o selenidech Českého masívu. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 82-89.
    Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38.
    Vavřín, I.: Nové poznatky o selenidech Českého masívu. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 82-89.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Clausthal-Zellerfeld
          • Lerbach
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
        • Lautenthal
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
        • St Andreasberg District
          • St Andreasberg
    		Wittern: "Mineralfundorte in Deutschland", 2001
    • Saxony-Anhalt
      • Harz Mts
        • Gernrode
          • Rieder
    		Schaarschmidt, H. (2007): Weltweit einmalig: Clausthalit als freie Kristalle aus dem Harz. Lapis 32 (3), 41-42. (in German)
    Wittern: "Mineralfundorte in Deutschland", 2001
    • Saxony
      • Erzgebirge
        • Schlema-Hartenstein District
    		FÖRSTER et al. (2003) Canadian Mineralogist 41, 1433-1444
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Qaqortoq (Julianehåb)
    		Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Kłodzko District
    		Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Sweden
     
    • Östergötland
      • Valdemarsvik
    		[Zeitschrift für Kristallographie, volume 108, pp. 389(1957); Clark, 1993 - "Hey's Mineral Index"]
    UK
     
    • England
      • Devon
        • South Devon
          • Torquay
    		[Camm, 1995, 71 - "Gold in the Counties of Cornwall and Devon"]
    USA
     
    • Colorado
      • Montrose Co.
        • Uravan District
          • Paradox Valley
    		Minerals of Colorado (1997) Eckels, E. B.
      • San Miguel Co.
        • Slick Rock District
    		Minerals of Colorado (1997) Eckels, E. B.
    • Nevada
      • Clark Co.
        • Goodsprings District
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Elko Co.
        • Gold Circle District (Midas District)
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Humboldt Co.
        • Sulfur District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Utah
      • San Juan Co.
        • Paradox Valley
          • Paradox Valley District
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    Mineral and/or Locality
    Google
     
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