Ferroskutterudite Mineral Data

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General Ferroskutterudite Information

Chemical Formula:

(Fe,Co)As3

Composition:

Molecular Weight = 276.94 gm

Iron 12.10 % Fe

Cobalt 8.38 % Co

Nickel 0.04 % Ni

Arsenic 78.13 % As

Sulfur 1.34 % S

______

100.00 %

Empirical Formula:

Fe²⁺_0.6Co_0.39Ni_0.002As_2.88S_0.11

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

Cell Dimensions:

a = 8.17, Z = 8; V = 545.34 Den(Calc)= 6.75

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: Im3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Physical Properties of Ferroskutterudite

Color:

Tin white.

Diaphaneity:

Opaque

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Metallic

Optical Properties of Ferroskutterudite

RL Anisotrophism:

None.

RL Bireflectance:

None.

RL Color:

White.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Ferroskutterudite in Air**
λ	R	∑ R(λ)
400 nm	57.20
420 nm	57.60
440 nm	58.00
460 nm	58.20
470 nm	58.20
480 nm	58.20
500 nm	58.00
520 nm	57.60
540 nm	57.30
546 nm	57.20
560 nm	56.90
580 nm	56.40
589 nm	56.20
600 nm	56.00
620 nm	55.50
640 nm	55.20
650 nm	54.90
660 nm	54.70
680 nm	54.30
700 nm	53.80

**Calculated Relative Intensity Colors of Ferroskutterudite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%
R

Calculated Properties of Ferroskutterudite

Electron Density:

Bulk Density (Electron Density)=6.02 gm/cc
note: Specific Gravity of Ferroskutterudite =6.75 gm/cc.

Fermion Index:

Fermion Index = 0.0026706206
Boson Index = 0.9973293794

Photoelectric:

PE_{Ferroskutterudite}= 63.60 barns/electron
U=PE_{Ferroskutterudite} x rElectron Density= 382.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferroskutterudite is Not Radioactive

Ferroskutterudite Classification

Dana Class:

02.12.17.04 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.17)Skutterudite Series

02.12.17.01 Skutterudite (Co,Ni)As3-x I m3 2/m 3

02.12.17.02 Nickelskutterudite (Ni,Co)As3-x I m3 2/m 3

02.12.17.03 Kieftite CoSb3 I m3 2/m 3

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

02.E - Metal Sulfides, M:S £ 1:2

02.EC -M:S = 1:>2

02.EC.05 Dienerite? Ni3As I 43d 4 3m

02.EC.05 Kieftite CoSb3 I m3 2/m 3

02.EC.05 Nickelskutterudite (Ni,Co)As3-x I m3 2/m 3

02.EC.05 Skutterudite (Co,Ni)As3-x I m3 2/m 3

02.EC.05 Ferroskutterudite! (Fe,Co)As3 Im3 2/m 3

Other Ferroskutterudite Information

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 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Ferroskutterudite Specimen Label here :

Ferroskutterudite

(Fe,Co)As3
Dana No: 02.12.17.04 Strunz No: 02.EC.05
Locality:

Notes: