Mineralogy Database

Isocubanite Mineral Data

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General Isocubanite Information

Help on Chemical  Formula: Chemical Formula: CuFe2S3
Help on Composition: Composition: Molecular Weight = 271.44 gm
   Iron    41.15 %  Fe
   Copper  23.41 %  Cu
   Sulfur  35.44 %  S
          100.00 % 
Help on Empirical Formula: Empirical Formula: CuFe2+2S3
Help on Environment: Environment: Primary sulfide precipitate from hot, saline solutions that cool under seawater.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Submarine "black smokers", East Pacific Rise and Red Sea. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the isometric polymorph of cubanite.
Help on Name Pronunciation: Name Pronunciation: Isocubanite + Pronunciation Say ISOCUBANITE
Help on Synonym: Synonym: ICSD 42105
  PDF 27-166

Isocubanite Image

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  Isocubanite   Isochalcopyrite

Comments: SEM image of an aggregate of idiomorphic grains of isocubanite (formerly known as isochalcopyrite) associated with minor pyrite.
Location: Submarine sulphide deposits of the East Pacific Rise (EPR) and the Red Sea. Scale: See Image.
© Mineralogical Magazine

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  Isochalcopyrite   Isocubanite

Comments: Polished section showing isocubanite (formerly isochalcopyrite) with exsolved chalcopyrite infilling and replacing cross-bedded turbiditic hydrothermally altered sandstone.
Location: Unit VI, Deep Copper Zone, Bent Hill Massive Sulfide Deposit, Middle Valley, Northern Juan de Fuca Ridge. Scale: See Image.
© National Resouces of Canada

Isocubanite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.303, Z = 1.333; V = 149.13 Den(Calc)= 4.03
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.059(1), 1.876(0.7), 1.602(0.5),

Physical Properties of Isocubanite

Help on Color: Color: Bronze.
Help on Density: Density: 3.925
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic

Optical Properties of Isocubanite

Help on RL Color: RL Color: Pinkish brown, similar to bornite.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Isocubanite in Air
λ R  ∑ R(λ) 
 420 nm   22.70   
 440 nm   24.60 
 460 nm   26.90 
 480 nm   29.20 
 500 nm   31.30 
 520 nm   33.20 
 540 nm   34.50 
 560 nm   36.20 
 580 nm   37.40 
 600 nm   38.20 
 620 nm   39.10 
 640 nm   39.70 
 660 nm   40.30 
 680 nm   40.90 
 700 nm   41.30 
Calculated Relative Intensity Colors of Isocubanite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 340%

Calculated Properties of Isocubanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.83 gm/cc
note: Specific Gravity of Isocubanite =4.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEIsocubanite = 24.86 barns/electron
U=PEIsocubanite x rElectron Density= 95.22 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Isocubanite is Not Radioactive

Isocubanite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.13)Cubanite Group Cubanite CuFe2S3 Pcmn 2/m 2/m 2/m Argentopyrite AgFe2S3 Pmmn 2/m 2/m 2/m Isocubanite CuFe2S3 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 02.CB.55b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CB -With Zn, Fe, Cu, Ag, Au, etc
02.CB.55b Isocubanite CuFe2S3 F m3m 4/m 3 2/m

Other Isocubanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p503,1989) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Isocubanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.CB.55b





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