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Cubanite

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Formula:
CuFe2S3
Colour:
Brass to bronze-yellow
Lustre:
Metallic
Hardness:
Specific Gravity:
4.03 - 4.18
Crystal System:
Orthorhombic
Name:
After the type locality in the country of Cuba.
Dimorph of:
Very sensitive to temperature, pressure and compositional variations.
When heated between 200 and 210°C, cubanite transforms irreversibly to isocubanite (Cabri et al. 1973).

Unlike the other chemically similar, but much more common Cu-Fe-sulphide, chalcopyrite, cubanite is weakly magnetic.




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Classification of CubaniteHide

Approved, 'Grandfathered' (first described prior to 1959)
2.CB.55a

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.
2.9.13.1

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
3.1.22

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

Physical Properties of CubaniteHide

Metallic
Transparency:
Opaque
Colour:
Brass to bronze-yellow
Streak:
Gray-black
Hardness:
3½ on Mohs scale
Parting:
on {110} {130}
Fracture:
Conchoidal
Density:
4.03 - 4.18 g/cm3 (Measured)    4.076 g/cm3 (Calculated)

Optical Data of CubaniteHide

Type:
Anisotropic
Anisotropism:
Distinctive

Chemical Properties of CubaniteHide

Formula:
CuFe2S3

Crystallography of CubaniteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 6.467(1) Å, b = 11.117(1) Å, c = 6.231(2) Å
Ratio:
a:b:c = 0.582 : 1 : 0.56
Unit Cell V:
447.97 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Elongated, thick tabular
Twinning:
Common on {110}. Pairs, fourlings and sixlings.
Comment:
Space group Pcmn (non-standard setting).

Crystallographic forms of CubaniteHide

Crystal Atlas:
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Cubanite - {110}, {010}, {101}, modified
Cubanite - {100}, {110}, {001}, {011}, modified
3d models and HTML5 code kindly provided by www.smorf.nl.

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X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.49 (4)
3.22 (10)
3.00 (4)
2.79 (4)
1.867 (8)
1.750 (7)
1.165 (5)

Type Occurrence of CubaniteHide

Synonyms of CubaniteHide

Other Language Names for CubaniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Pyrrhotite31 photos of Cubanite associated with Pyrrhotite on mindat.org.
Dolomite24 photos of Cubanite associated with Dolomite on mindat.org.
Calcite23 photos of Cubanite associated with Calcite on mindat.org.
Siderite19 photos of Cubanite associated with Siderite on mindat.org.
Mooihoekite15 photos of Cubanite associated with Mooihoekite on mindat.org.
Paolovite10 photos of Cubanite associated with Paolovite on mindat.org.
Cabriite9 photos of Cubanite associated with Cabriite on mindat.org.
Magnetite9 photos of Cubanite associated with Magnetite on mindat.org.
Quartz8 photos of Cubanite associated with Quartz on mindat.org.
Silver8 photos of Cubanite associated with Silver on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.CB.AgmantiniteAg2MnSnS4Orth.
2.CB.05aColoradoiteHgTeIso. m3m (4/m 3 2/m)
2.CB.05aHawleyiteCdSIso. 4 3m : F4 3m
2.CB.05aMetacinnabarHgSIso. 4 3m : F4 3m
2.CB.05cPolhemusite(Zn,Hg)STet.
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4 Iso.
2.CB.05aSphaleriteZnSIso. 4 3m : F4 3m
2.CB.05aStilleiteZnSe
2.CB.05aTiemanniteHgSe
2.CB.05UM1998-15-S:CuFeZnCu2Fe3Zn5S10
2.CB.05aRudashevskyite(Fe,Zn)SIso. 4 3m : F4 3m
2.CB.10aChalcopyriteCuFeS2Tet. 4 2m : I4 2d
2.CB.10aEskeborniteCuFeSe2Tet.
2.CB.10aGalliteCuGaS2Tet. 4 2m : I4 2d
2.CB.10bHaycockiteCu4Fe5S8Orth. 2 2 2
2.CB.10aLenaiteAgFeS2Tet. 4 2m : I4 2d
2.CB.10bMooihoekiteCu9Fe9S16Tet.
2.CB.10bPutoraniteCu1.1Fe1.2S2Iso.
2.CB.10aRoquesiteCuInS2Tet. 4 2m : I4 2d
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m
2.CB.10aLaforêtiteAgInS2Tet. 4 2m : I4 2d
2.CB.15aČernýiteCu2(Cd,Zn,Fe)SnS4Tet. 4 2m : I4 2m
2.CB.15aFerrokesteriteCu2(Fe,Zn)SnS4Tet. 4 : I4
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4Tet. 4 2m : I4 2m
2.CB.15aIdaiteCu5FeS6Hex.
2.CB.15aKesterite Cu2ZnSnS4Tet. 4 : I4
2.CB.15aKuramiteCu3SnS4Tet.
2.CB.15bMohiteCu2SnS3Mon.
2.CB.15aPirquitasiteAg2ZnSnS4Tet. 4 : I4
2.CB.15aStanniteCu2FeSnS4Tet. 4 2m : I4 2m
2.CB.15cStannoiditeCu+6Cu2+2(Fe2+,Zn)3Sn2S12Orth.
2.CB.15aVelikiteCu2HgSnS4Tet.
2.CB.15cUM2006-11-S:CuFeGeZnCu8(Fe,Zn)3Ge2S12 (?)
2.CB.20ChatkaliteCu6FeSn2S8Tet. 4 2m : P4m2
2.CB.20MawsoniteCu6Fe2SnS8Tet. 4 2m : P4m2
2.CB.30ColusiteCu12VAs3S16Iso. 4 3m : P4 3n
2.CB.30GermaniteCu13Fe2Ge2S16Iso. 4 3m : P4 3n
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32Iso.
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32Iso.
2.CB.30StibiocolusiteCu13V(Sb,Sn,As)3S16Iso.
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32Iso.
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32
2.CB.35aHemusiteCu6SnMoS8Iso.
2.CB.35aKiddcreekiteCu6SnWS8Iso. 4 3m : F4 3m
2.CB.35aPolkovicite(Fe,Pb)3(Ge,Fe)1-xS4Iso.
2.CB.35aRenierite(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16Tet. 4 2m : P4 2c
2.CB.35aVincienniteCu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16Tet.
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4Iso.
2.CB.35bCatamarcaiteCu6GeWS8Hex. 6mm : P63mc
2.CB.40LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
2.CB.45CadmoseliteCdSeHex. 6mm : P63mc
2.CB.45GreenockiteCdSHex. 6mm : P63mc
2.CB.45Wurtzite(Zn,Fe)SHex. 6mm : P63mc
2.CB.45RambergiteMnSHex. 6mm : P63mc
2.CB.45Buseckite(Fe,Zn,Mn)SHex. 6mm : P63mc
2.CB.55bIsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
2.CB.60PicotpauliteTlFe2S3Orth. mmm (2/m 2/m 2/m) : Cmcm
2.CB.60RaguiniteTlFeS2Orth.
2.CB.65ArgentopyriteAgFe2S3Mon. 2/m
2.CB.65SternbergiteAgFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.70SulvaniteCu3VS4Iso.
2.CB.75VulcaniteCuTeOrth.
2.CB.80EmpressiteAgTeOrth. mmm (2/m 2/m 2/m)
2.CB.85MuthmanniteAuAgTe2Mon. 2/m : P2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

2.9.13.2ArgentopyriteAgFe2S3Mon. 2/m
2.9.13.3IsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.1.1ChalcociteCu2SMon. 2/m : P21/b
3.1.2DjurleiteCu31S16Mon. 2/m
3.1.3DigeniteCu9S5Trig. 3m (3 2/m) : R3m
3.1.4AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
3.1.5RoxbyiteCu9S5Tric. 1 : P1
3.1.6SpionkopiteCu39S28Trig.
3.1.7GeeriteCu8S5Trig. 3
3.1.8CovelliteCuSHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.1.9BerzelianiteCu2SeIso. m3m (4/m 3 2/m) : Fm3m
3.1.10BellidoiteCu2SeTet. 4/m : P42/n
3.1.11UmangiteCu3Se2Tet.
3.1.12YarrowiteCu9S8Trig.
3.1.13AthabascaiteCu5Se4Orth.
3.1.14KlockmanniteCuSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.1.15Krut'aiteCuSe2Iso. m3 (2/m 3) : Pa3
3.1.16WeissiteCu2-xTeHex.
3.1.17RickarditeCu7Te5Orth.
3.1.18VulcaniteCuTeOrth.
3.1.19BambollaiteCu(Se,Te)2Tet.
3.1.20LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
3.1.21MgriiteCu3AsSe3
3.1.23BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
3.1.24FukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
3.1.25ChalcopyriteCuFeS2Tet. 4 2m : I4 2d
3.1.26MooihoekiteCu9Fe9S16Tet.
3.1.27HaycockiteCu4Fe5S8Orth. 2 2 2
3.1.28IsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
3.1.29IdaiteCu5FeS6Hex.
3.1.30NukundamiteCu3.4Fe0.6S4Trig. 3m (3 2/m) : P3m1
3.1.31PutoraniteCu1.1Fe1.2S2Iso.
3.1.32Orickite2CuFeS2 · H2OHex.
3.1.33EskeborniteCuFeSe2Tet.
3.1.34Chaméanite(Cu,Fe)4As(Se,S)4Iso.
3.1.35TalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m

Other InformationHide

Magnetism:
Ferromagnetic
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 CubaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Breithaupt, J.F.A. (1843) Cuban, ein neuer, dem Weisskupfererz ähnlicher Kies. Annalen der Physik und Chemie: 59: 325-327.
Palache, C., Berman, H., Frondel, C. (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.: 243-245.
Greenwood, N.N., Whitfield, H.J. (1968) Mössbauer effect studies on cubanite (CuFe2S3) and related iron sulfides. Journal of the Chemical Society, A: 1697-1699.
Fleet, M.E. (1971) Refinement of the crystal structure of cubanite and polymorphism of CuFe2S3. Zeitschrift für Kristallographie: 132: 276-287.
Fleet, M.E. (1972) A note on the oxidation state of iron in cubanite. The Canadian Mineralogist: 11: 901-902.
Cabri, L.J., Hall, S.R., Szymanski, J.T., Stewart, J.M. (1973) On the transformation of cubanite. The Canadian Mineralogist: 12: 33-38.
Szymanski, J.T. (1974) A refinement of the structure of cubanite, CuFe2S3. Zeitschrift für Kristallographie: 140: 218-239.
Dutrizac, J.E. (1976) Reactions in cubanite and chalcopyrite. The Canadian Mineralogist: 14: 172-181.
Mizota, T., Tanaka, H., Fujii, Y., Koto, K. (1985) The heat capacity of cubanite and the anomaly in cubic CuFe2S3. The Canadian Mineralogist: 23: 77-82.
Gibbs, G.V., Cox, D.F., Rosso, K.M., Ross, N.L., Downs, R.T., Spackman, M.A. (2007) Theoretical electron density distribution for Fe- and Cu-sulfide Earth materials: A connection between bond length, bond critical point properties, local energy densities, and bonded interactions. Journal of Physical Chemistry B: 111: 1923-1931.
Yang, H., Pinch, W.W., Downs, R.T. (2009) Crystal structure of argentopyrite, AgFe2S3, and its relationship with cubanite. American Mineralogist: 94: 1727-1730.
Chandra, U., Parthasarathy, G., Sharma, P. (2010) Synthetic cubanite CuFe2S3: pressure-induced transformation to isocubanite. The Canadian Mineralogist: 48: 1137-1147.
Nenasheva, S.N. & Kravchenko, T.A. (2015): Composition features of isocubanite and polymorphous modifications of CuFe2S3 compound. Geology of Ore Deposits, 57, 626-633.

Internet Links for CubaniteHide

Localities for CubaniteHide

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.

Locality ListShow

Mineral and/or Locality  
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