Skutterudite Mineral Data (original) (raw)

General Skutterudite Information

Help on Chemical  Formula: Chemical Formula:

(Co,Ni)As3-x

Help on Composition: Composition:

Molecular Weight = 246.18 gm

Cobalt 17.95 % Co

Nickel 5.96 % Ni

Arsenic 76.09 % As

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Co0.75Ni0.25As2.5

Help on Environment: Environment:

Hydrothermal ore mineral found in high temperature veins with other Ni-Co minerals.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1845

Help on Locality: Locality:

Skutterud, Norway. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after its locality. Smaltite In reference to smalt, a deep blue glaze in which this mineral was used to furnish the necessary cobalt.

Help on Name Pronunciation: Name Pronunciation:

Skutterudite + Pronunciation Say SKUTTERUDITE

Help on Synonym: Synonym:

ICSD 9188

PDF 10-328

Smaltite

Skutterudite Image

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Skutterudite Crystallography

Help on Cell Dimensions: Cell Dimensions:

a = 8.19, Z = 8; V = 549.35 Den(Calc)= 5.95

Help on Crystal System: Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: I m3

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.592(1), 1.835(0.35), 2.193(0.35),

Help on Forms: Forms:

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| | Forms:( 1 1 1) ( 1 0 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | -------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Skutterudite Structure Window Crystal Structure:

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| | Mandel N , Donohue J , Acta Crystallographica, Section B , 27 (1971) p.2288-2289, The refinement of the crystal structure of skutterudite, CoAs3, Locality: Bou-Azzer, Morocco | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Skutterudite

Help on Cleavage: Cleavage:

{100} Distinct, {111} Distinct

Help on Color: Color:

White, Light steel gray.

Help on Density: Density:

6.1 - 6.9, Average = 6.5

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Colloform - Forming from a gel or colloidal mass.

Help on Habit: Habit:

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

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Hardness: Hardness:

5.5-6 - Knife Blade-Orthoclase

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Metallic

Help on Magnetism: Magnetism:

Nonmagnetic

Help on Streak: Streak:

black

Optical Properties of Skutterudite

Help on RL Color: RL Color:

Gray, creamy or golden white.

Help on RL Pleochroism: RL Pleochroism:

None.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Skutterudite in Air

λ R R(λ)
400 nm 59.10
420 nm 57.80
440 nm 56.50
460 nm 55.60
480 nm 55.00
500 nm 54.50
520 nm 54.20
540 nm 54.00
560 nm 53.80
580 nm 53.60
600 nm 53.50
620 nm 53.20
640 nm 53.00
660 nm 52.90
680 nm 52.80
700 nm 52.70

Calculated Relative Intensity Colors of Skutterudite in Air

RelativeIntensity 0% 20% 40% 60% 80% 100% 120% 140% 160% 170%
R

Calculated Properties of Skutterudite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=5.31 gm/cc
note: Specific Gravity of Skutterudite =5.95 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0006734977
Boson Index = 0.9993265023

Help on Photoelectric: Photoelectric:

PESkutterudite = 64.18 barns/electron
U=PESkutterudite x rElectron Density= 340.49 barns/cc.

Help on Radioactivity: Radioactivity:

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

Skutterudite Classification

Help on  Dana Class: Dana Class:

02.12.17.01 (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

Help on  Strunz Class: 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 Skutterudite Information

Help on References: References:

NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

Help on See Also: See Also:

Links to other databases for Skutterudite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Scandinavian mineral gallery
18 - WWW-MINCRYST
19 - theimage

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Ask about Skutterudite here :
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Print or Cut-and-Paste your Skutterudite Specimen Label here :

Skutterudite

(Co,Ni)As3-x
Dana No: 02.12.17.01 Strunz No: 02.EC.05
Locality:

Notes: