Skutterudite Mineral Data

Skutterudite Mineral Data
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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   Erythrite

Comments: Erythrite crystal on massive skutterudite.
Location: Bou Azzer, Morocco. Scale: Crystal size 1.5 cm.
© John Veevaert
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Skutterudite

Comments: Cubic crystals of Skutterudite on matrix.
Location: Bou Azzer, Anti-Atlas Mountains, Morrocco. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Skutterudite

Comments: Bright, untarnished, metallic crystals of skutterudite up to 1 cm.
Location: Bou Azzer, Morocco. Scale: Picture size 3 cm.
© Sandro Maggia/Minernet.it

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)

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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
Relative
Intensity		    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: