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Isocubanite Mineral Data
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General Isocubanite Information
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 Chemical Formula: |
CuFe2S3 |
| Composition: |
Molecular Weight = 271.44 gm |
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Iron 41.15 % Fe |
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Copper 23.41 % Cu |
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Sulfur 35.44 % S |
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______ |
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100.00 % |
| Empirical Formula: |
CuFe2+2S3 |
| Environment: |
Primary sulfide precipitate from hot, saline solutions that cool under seawater. |
| IMA Status: |
Approved IMA 1988 |
| Locality: |
Submarine "black smokers", East Pacific Rise and Red Sea. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the isometric polymorph of cubanite. |
| Name Pronunciation: |
Isocubanite + Pronunciation  |
| Synonym: |
ICSD 42105 |
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Isochalcopyrite |
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PDF 27-166 |
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Isocubanite Image |
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Images:
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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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Images:
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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 |
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Isocubanite Crystallography
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| Cell Dimensions: |
a = 5.303, Z = 1.333; V = 149.13 Den(Calc)= 4.03 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.059(1), 1.876(0.7), 1.602(0.5), |
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Physical Properties of Isocubanite
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| Color: |
Bronze. |
| Density: |
3.925 |
| Diaphaneity: |
Opaque |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
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Optical Properties of Isocubanite
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| RL Color: |
Pinkish brown, similar to bornite. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Isocubanite in Air
| λ |
R |
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∑ R(λ) |
| 420 nm |
22.70 |
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| 440 nm |
24.60 |
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| 460 nm |
26.90 |
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| 480 nm |
29.20 |
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| 500 nm |
31.30 |
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| 520 nm |
33.20 |
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| 540 nm |
34.50 |
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| 560 nm |
36.20 |
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| 580 nm |
37.40 |
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| 600 nm |
38.20 |
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| 620 nm |
39.10 |
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| 640 nm |
39.70 |
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| 660 nm |
40.30 |
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| 680 nm |
40.90 |
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| 700 nm |
41.30 |
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Calculated Relative Intensity Colors of Isocubanite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
340% |
| R |
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Calculated Properties of Isocubanite
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| Electron Density: |
Bulk Density (Electron Density)=3.83 gm/cc
note: Specific Gravity of Isocubanite =4.03 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEIsocubanite = 24.86 barns/electron
U=PEIsocubanite x rElectron Density= 95.22 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Isocubanite is Not Radioactive |
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Isocubanite Classification
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| Dana Class: |
02.09.13.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.09)where Am Bn Xp, with (m+n):p=1:1 |
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(02.09.13)Cubanite Group |
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02.09.13.01 Cubanite CuFe2S3 Pcmn 2/m 2/m 2/m |
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02.09.13.02 Argentopyrite AgFe2S3 Pmmn 2/m 2/m 2/m |
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02.09.13.03 Isocubanite CuFe2S3 F m3m 4/m 3 2/m |
| Strunz Class: |
02.CB.55b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CB -With Zn, Fe, Cu, Ag, Au, etc |
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02.CB.55b Isocubanite CuFe2S3 F m3m 4/m 3 2/m |
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Other Isocubanite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p503,1989) OPTIC PROP.(AntBidBlaNic1) |
| 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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Print or Cut-and-Paste your Isocubanite Specimen Label here :
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Isocubanite
CuFe2S3
Dana No: 02.09.13.03 Strunz No: 02.CB.55b
Locality:
Notes:
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