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Ferroskutterudite Mineral Data
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General Ferroskutterudite Information
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 Chemical Formula: |
(Fe,Co)As3 |
| Composition: |
Molecular Weight = 276.94 gm |
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Iron 12.10 % Fe |
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Cobalt 8.38 % Co |
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Nickel 0.04 % Ni |
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Arsenic 78.13 % As |
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Sulfur 1.34 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Fe2+0.6Co0.39Ni0.002As2.88S0.11 |
| Environment: |
Found in dolomite-calcite veins with other arsenides. Skutterudite group. |
| IMA Status: |
Approved IMA 2006 (Dana # Added) |
| Locality: |
Konsomolsk mine, Talnakh, Norilsk, Russia Link to MinDat.org Location Data. |
| Name Origin: |
Named as the Fe analog of skutterudite. |
| Synonym: |
IMA2006-032 |
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Ferroskutterudite Crystallography
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| Cell Dimensions: |
a = 8.17, Z = 8; V = 545.34 Den(Calc)= 6.75 |
| Crystal System: |
Isometric - Diploidal H-M Symbol (2/m 3) Space Group: Im3 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.858(1)(310), 2.182(0.9)(321), 1.602(0.7)(510),1.829(0.7)(420), 1.402(0.6)(530), 1.667(0.5)(422), |
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Physical Properties of Ferroskutterudite
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| Color: |
Tin white. |
| Diaphaneity: |
Opaque |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
6-6.5 - Orthoclase-Pyrite |
| Luster: |
Metallic |
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Optical Properties of Ferroskutterudite
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| RL Anisotrophism: |
None. |
| RL Bireflectance: |
None. |
| RL Color: |
White. |
| RL Pleochroism: |
None. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Ferroskutterudite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
57.20 |
 |
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| 420 nm |
57.60 |
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| 440 nm |
58.00 |
 |
| 460 nm |
58.20 |
 |
| 470 nm |
58.20 |
 |
| 480 nm |
58.20 |
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| 500 nm |
58.00 |
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| 520 nm |
57.60 |
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| 540 nm |
57.30 |
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| 546 nm |
57.20 |
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| 560 nm |
56.90 |
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| 580 nm |
56.40 |
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| 589 nm |
56.20 |
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| 600 nm |
56.00 |
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| 620 nm |
55.50 |
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| 640 nm |
55.20 |
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| 650 nm |
54.90 |
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| 660 nm |
54.70 |
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| 680 nm |
54.30 |
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| 700 nm |
53.80 |
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Calculated Relative Intensity Colors of Ferroskutterudite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
| R |
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Calculated Properties of Ferroskutterudite
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| Electron Density: |
Bulk Density (Electron Density)=6.02 gm/cc
note: Specific Gravity of Ferroskutterudite =6.75 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0026706206
Boson Index = 0.9973293794 |
| Photoelectric: |
PEFerroskutterudite = 63.60 barns/electron
U=PEFerroskutterudite x rElectron Density= 382.77 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferroskutterudite is Not Radioactive |
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Ferroskutterudite Classification
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| Dana Class: |
02.12.17.04 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.17)Skutterudite Series |
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02.12.17.01 Skutterudite (Co,Ni)As3-x I m3 2/m 3 |
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02.12.17.02 Nickelskutterudite (Ni,Co)As3-x I m3 2/m 3 |
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02.12.17.03 Kieftite CoSb3 I m3 2/m 3 |
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02.12.17.04 Ferroskutterudite! (Fe,Co)As3 Im3 2/m 3 |
| Strunz Class: |
02.EC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EC -M:S = 1:>2 |
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02.EC.05 Dienerite? Ni3As I 43d 4 3m |
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02.EC.05 Kieftite CoSb3 I m3 2/m 3 |
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02.EC.05 Nickelskutterudite (Ni,Co)As3-x I m3 2/m 3 |
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02.EC.05 Skutterudite (Co,Ni)As3-x I m3 2/m 3 |
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02.EC.05 Ferroskutterudite! (Fe,Co)As3 Im3 2/m 3 |
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Other Ferroskutterudite Information
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| References: |
NAME( AmMin, v93:1687) PHYS. PROP.(AmMin, v93:1687) OPTIC PROP.(AmMin, v93:1687) |
| See Also: |
Links to other databases for Ferroskutterudite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Ferroskutterudite Specimen Label here :
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Ferroskutterudite
(Fe,Co)As3
Dana No: 02.12.17.04 Strunz No: 02.EC.05
Locality:
Notes:
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