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Cubanite

This page kindly sponsored by David K. Joyce
Formula:
CuFe2S3
System:
Orthorhombic
Colour:
Brass to bronze-yellow
Lustre:
Metallic
Hardness:
Name:
After the type locality in the country of Cuba.
Dimorph of:
Very sensitive to temperature, pressure and compositional variations.
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.


Classification of Cubanite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
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First Recorded Occurrence of Cubanite

Year of Discovery:
1843

Occurrences of Cubanite

Geological Setting:
High temperature hydrothermal deposits

Physical Properties of Cubanite

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

Crystallography of Cubanite

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 Volume:
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 Cubanite

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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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray 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)

Optical Data of Cubanite

Type:
Anisotropic
Anisotropism:
Distinctive

Chemical Properties of Cubanite

Formula:
CuFe2S3
Essential elements:
All elements listed in formula:

Relationship of Cubanite to other Species

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.10aEskeborniteCuFeSe2
2.CB.10aGalliteCuGaS2
2.CB.10bHaycockiteCu4Fe5S8
2.CB.10aLenaiteAgFeS2
2.CB.10bMooihoekiteCu9Fe9S16
2.CB.10bPutoraniteCu9(Fe,Ni)9S16
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.15aKësteriteCu2(Zn,Fe)SnS4
2.CB.15aKuramiteCu3SnS4
2.CB.15bMohiteCu2SnS3
2.CB.15aPirquitasiteAg2ZnSnS4
2.CB.15aStanniteCu2(Fe,Zn)SnS4
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.30ColusiteCu26V2(As,Sn,Sb)6S32
2.CB.30GermaniteCu13Fe2Ge2S16
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32
2.CB.30StibiocolusiteCu13V4(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(Cu,Zn)11(Ge,As)2Fe4S16
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.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
3.1.23BorniteCu5FeS4
3.1.24FukuchiliteCu3FeS8
3.1.25ChalcopyriteCuFeS2
3.1.26MooihoekiteCu9Fe9S16
3.1.27HaycockiteCu4Fe5S8
3.1.28IsocubaniteCuFe2S3
3.1.29IdaiteCu5FeS6
3.1.30NukundamiteCu3.4Fe0.6S4
3.1.31PutoraniteCu9(Fe,Ni)9S16
3.1.32Orickite2CuFeS2 · H2O
3.1.33EskeborniteCuFeSe2
3.1.34Chaméanite(Cu,Fe)4As(Se,S)4
3.1.35TalnakhiteCu9(Fe,Ni)8S16

Other Names for Cubanite

Other Information

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 Cubanite

Reference List:
Breithaupt, J. F. A. (1843): Cuban, ein neuer, dem Weisskupfererz ähnlicher Kies. Annalen der Physik und Chemie, 59, 325-327.

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.: 243-245.

Greenwood, N.N. and 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.

Cabri L J, Hall S R, Szymanski J T, Stewart J M (1973): On the transformation of cubanite. 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. Canadian Mineralogist, 14, 172-181.

Chandra, U., Parthasarathy, G., Sharma, P. (2010): Synthetic cubanite CuFe2S3: pressure-induced transformation to isocubanite. Canadian Mineralogist, 48, 1137-1147.

Internet Links for Cubanite

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

Localities for Cubanite

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.
Mineral and/or Locality  
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