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Eskebornite

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Formula:
CuFeSe2
System:
Tetragonal
Colour:
Brass yellow
Hardness:
3 - 3½
Name:
For the type locality

Classification of Eskebornite

Approved, 'Grandfathered' (first described prior to 1959)
2.CB.10a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.9.1.2

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
3.1.33

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
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Type Occurrence of Eskebornite

Place of Conservation of Type Material:
Harvard University

Occurrences of Eskebornite

Geological Setting:
Low temperature hydrothermal deposits

Physical Properties of Eskebornite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Brass yellow
Comment:
Tarnishes dark brown to black
Streak:
Black
Hardness (Mohs):
3 - 3½
Hardness (Vickers):
VHN15=155 - 252 kg/mm2
Cleavage:
Perfect
on {001}
Density:
5.35 g/cm3 (Measured)    5.44 g/cm3 (Calculated)

Crystallography of Eskebornite

Crystal System:
Tetragonal
Morphology:
Thick tabular crystals to 1mm

Optical Data of Eskebornite

Type:
Anisotropic
Anisotropism:
Marked - yellowish to tan
Colour in reflected light:
brown-yellow or cream-yellow sometimes with orange tint
Pleochroism:
Weak
Comments:
Creamy yellow to yellowish brown

Chemical Properties of Eskebornite

Formula:
CuFeSe2
All elements listed in formula:

Relationship of Eskebornite to other Species

Series:
Forms a series with Chalcopyrite (see here)
Other Members of Group:
2.CB.AgmantiniteAg2MnSnS4
2.CB.05aColoradoiteHgTe
2.CB.05aHawleyiteCdS
2.CB.05aMetacinnabarHgS
2.CB.05cPolhemusite(Zn,Hg)S
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4
2.CB.05aSphaleriteZnS
2.CB.05aStilleiteZnSe
2.CB.05aTiemanniteHgSe
2.CB.05UM1998-15-S:CuFeZnCu2Fe3Zn5S10
2.CB.05aRudashevskyite(Fe,Zn)S
2.CB.10aChalcopyriteCuFeS2
2.CB.10aGalliteCuGaS2
2.CB.10bHaycockiteCu4Fe5S8
2.CB.10aLenaiteAgFeS2
2.CB.10bMooihoekiteCu9Fe9S16
2.CB.10bPutoraniteCu1.1Fe1.2S2
2.CB.10aRoquesiteCuInS2
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16
2.CB.10aLaforêtiteAgInS2
2.CB.15aČernýiteCu2(Cd,Zn,Fe)SnS4
2.CB.15aFerrokësteriteCu2(Fe,Zn)SnS4
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4
2.CB.15aIdaiteCu5FeS6
2.CB.15aKësteriteCu2ZnSnS4
2.CB.15aKuramiteCu3SnS4
2.CB.15bMohiteCu2SnS3
2.CB.15aPirquitasiteAg2ZnSnS4
2.CB.15aStanniteCu2FeSnS4
2.CB.15cStannoiditeCu6+Cu22+(Fe2+,Zn)3Sn2S12
2.CB.15aVelikiteCu2HgSnS4
2.CB.15cUM2006-11-S:CuFeGeZnCu8(Fe,Zn)3Ge2S12 (?)
2.CB.20ChatkaliteCu6FeSn2S8
2.CB.20MawsoniteCu6Fe2SnS8
2.CB.30ColusiteCu12VAs3S16
2.CB.30GermaniteCu13Fe2Ge2S16
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32
2.CB.30StibiocolusiteCu13V(Sb,Sn,As)3S16
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32
2.CB.35aHemusiteCu6SnMoS8
2.CB.35aKiddcreekiteCu6SnWS8
2.CB.35aPolkovicite(Fe,Pb)3(Ge,Fe)1-xS4
2.CB.35aRenierite(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16
2.CB.35aVincienniteCu7+Cu32+Fe22+Fe23+Sn(As,Sb)S16
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4
2.CB.35bCatamarcaiteCu6GeWS8
2.CB.40LautiteCuAsS
2.CB.45CadmoseliteCdSe
2.CB.45GreenockiteCdS
2.CB.45Wurtzite(Zn,Fe)S
2.CB.45RambergiteMnS
2.CB.45Buseckite(Fe,Zn,Mn)S
2.CB.55aCubaniteCuFe2S3
2.CB.55bIsocubaniteCuFe2S3
2.CB.60PicotpauliteTlFe2S3
2.CB.60RaguiniteTlFeS2
2.CB.65ArgentopyriteAgFe2S3
2.CB.65SternbergiteAgFe2S3
2.CB.70SulvaniteCu3VS4
2.CB.75VulcaniteCuTe
2.CB.80EmpressiteAgTe
2.CB.85MuthmanniteAuAgTe2
3.1.1ChalcociteCu2S
3.1.2DjurleiteCu31S16
3.1.3DigeniteCu9S5
3.1.4AniliteCu7S4
3.1.5RoxbyiteCu9S5
3.1.6SpionkopiteCu39S28
3.1.7GeeriteCu8S5
3.1.8CovelliteCuS
3.1.9BerzelianiteCu2Se
3.1.10BellidoiteCu2Se
3.1.11UmangiteCu3Se2
3.1.12YarrowiteCu9S8
3.1.13AthabascaiteCu5Se4
3.1.14KlockmanniteCuSe
3.1.15Krut'aiteCuSe2
3.1.16WeissiteCu2-xTe
3.1.17RickarditeCu7Te5
3.1.18VulcaniteCuTe
3.1.19BambollaiteCu(Se,Te)2
3.1.20LautiteCuAsS
3.1.21MgriiteCu3AsSe3
3.1.22CubaniteCuFe2S3
3.1.23BorniteCu5FeS4
3.1.24FukuchiliteCu3FeS8
3.1.25ChalcopyriteCuFeS2
3.1.26MooihoekiteCu9Fe9S16
3.1.27HaycockiteCu4Fe5S8
3.1.28IsocubaniteCuFe2S3
3.1.29IdaiteCu5FeS6
3.1.30NukundamiteCu3.4Fe0.6S4
3.1.31PutoraniteCu1.1Fe1.2S2
3.1.32Orickite2CuFeS2 · H2O
3.1.34Chaméanite(Cu,Fe)4As(Se,S)4
3.1.35TalnakhiteCu9(Fe,Ni)8S16

Other Names for Eskebornite

Name in Other Languages:
German:Eskebornit
Simplified Chinese:硒黄铜矿
Spanish:Eskebornita
Traditional Chinese:硒黃銅礦

Other Information

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

References for Eskebornite

Reference List:
Harris, D.C., Burke, E.A.J. (1971) Eskebornite, two Canadian Occurrences. The Canadian Mineralogist: 10: 787-796.

Fleischer, M. (1972) New mineral names. American Mineralogist: 57: 1552-1561.

Jambor, J.L., Burke, E.A.J. (1989) New mineral names. American Mineralogist: 74: 1399-1404.

Delgado, J.M., Diaz De Delgado, G., Quintero, M., and Wooley, J.C. (1992) The crystal structure of copper iron selenide, CuFeSe2. Mater. Research Bulletin: 27(3): 367-373.

Internet Links for Eskebornite

Specimens:
The following Eskebornite specimens are currently listed for sale on minfind.com.

Localities for Eskebornite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
    • General Lamadrid department
      • Villa Castelli
        • Sierra de Cacho
Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina); de Brodtkorb, M. K., & Crosta, S. (2010). Reseña de la ubicación geográfica de los seleniuros de la Sierra de Umango, provincia de La Rioja. Revista de la Asociación Geológica Argentina, 67(2), 272-279.
    • Vinchina Department
Recursos Minerales de la Republica Argentina, E. O. Zappettini Ed., Buenos Aires 1999 ISSN 0328-2325
  • Mendoza
    • Luján de Cuyo department
      • Cacheuta
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
Australia
 
  • Northern Territory
    • West Arnhem Region
      • South Alligator River
        • Rockhole area
Rajesh, H.M. (2008): Ore Geology Reviews 33, 382-396.
Bolivia
 
  • Potosí Department
    • Antonio Quijarro Province
[MinRec 21:133]
Bulgaria
 
  • Haskovo Oblast (Khaskovo Oblast)
    • Ivaylovgrad Obshtina
      • Ivaylovgrad
T. Kerestedjian (1997) Argentonentlandite (Fe, Ni)8+хАg1-xS8 from Kamilski dol – a new mineral species for Bulgaria. Review of the Bulgarian Geological Society 58:15-18
Canada
 
  • Saskatchewan
    • Beaverlodge Lake area
Can Min 10:787-796
Econ Geol (1997) 92:468-484; Canadian Mineralogist Vol. 10, pp.787-796 (1972)
China
 
  • Hubei Province
    • Enshi Autonomous Prefecture (E'xi Autonomous Prefecture)
      • Enshi Co.
Caixia Feng, Jiajun Liu, and Shen Liu (2002): Mineral Deposits 21(suppl.), 812-815; Hanjie Wen, Carignan, J., Yuzhuo Qiu, and Shirong Liu (2006): Environmental Science and Technology 40(4), 1126-1132
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
Strübel, Zimmer: "Lexikon der Minerale", 2nd Ed., 1991; Econ Geol (1997) 92:468-484
    • Plzeň Region
      • Klatovy (Klattau)
        • Švihov
Scharm, B., & Scharmová, M. (2000) Accessory minerals of siliceous rocks from the Kokšín hill near Mítov (Barrandian Neoproterozoic). Bulletin of Geosciences, 75(3), 307-318.
      • Planá u Mariánských Lázní (Plan)
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. ; Econ Geol (1997) 92:468-484
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.
      • Žďár nad Sázavou
        • Rožná deposit
Vavřín, I.: Nové poznatky o selenidech Českého masívu. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 82-89. ; Econ Geol (1997) 92:468-484
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. ; Econ Geol (1997) 92:468-484
Vavřín, I.: Nové poznatky o selenidech Českého masívu. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 82-89.
France
 
  • Auvergne
    • Puy-de-Dôme
      • Sauxillanges
        • Chaméane
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Econ Geol (1997) 92:468-484
Germany
 
  • Lower Saxony
    • Harz
      • Clausthal-Zellerfeld
        • Rosenhof veins
          • Lerbach
Weiss: "Mineralfundstellen, Deutschland West", 1990
  • Saxony-Anhalt
    • Harz
Tischendorf, G. (1969). Sources of elements in selenide mineralization near Tilkerode (Harz). International Geology Review, 11(11), 1298-1301.
NJMM (1988), 337
  • Saxony
    • Erzgebirge
      • Schlema-Hartenstein District
        • Alberoda
          • Shaft 366
The Canadian Mineralogist, V 42, 2004, pp. 1719-1732.
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Kłodzko District
Econ Geol (1997) 92:468-484; Pringle, G. J., & Thorpe, R. I. (1980). Bohdanowiczite, junoite and laitakarite from the Kidd Creek mine, Timmins, Ontario. The Canadian Mineralogist, 18(3), 353-360.
USA
 
  • Colorado
    • Garfield Co.
      • East Rifle Creek area
Minerals of Colorado (1997) Eckels, E. B.
Minerals of Colorado (1997) Eckels, E. B.
  • Nevada
    • Elko Co.
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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