Cobaltite Mineral Data + Say COBALTITE

General Cobaltite Information
Help on Chemical Formula: Chemical Formula: CoAsS
Help on Composition: Composition: Molecular Weight = 165.92 gm
   Cobalt   35.52 %  Co
   Arsenic  45.16 %  As
   Sulfur   19.33 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: CoAsS
Help on Environment: Environment: High temperature hydrotherma deposits and contact metamorphic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Mines in the Cobalt district, Ontario, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the German, Kobold, "underground spirit" or "goblin," in allusion to the refusal of cobaltiferous ores to smelt properly, hence "bewitched."
Help on Synonym: Synonym: ICSD 31189
  PDF 42-1345
 

Cobaltite Image

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Cobaltite

Comments: Cobaltite embedded in greenish gray dolomite.
Location: Espanola, Ontario, Canada. Scale: 1.3 cm across.
© John Veevaert

Cobaltite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9978:1:1
Help on Cell Dimensions: Cell Dimensions: a = 5.57, b = 5.582, c = 5.582, Z = 4; V = 173.55 Den(Calc)= 6.35
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P ca21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.68(1), 2.59(1), 2.77(0.8),
Help on Forms: Forms:

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Forms: [ 1 0 2] [ 1 0 0] [ 0 1 0]

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Giese R F , Kerr P F , American Mineralogist , 50 (1965) p.1002-1014, The crystal structures of ordered and disordered cobaltite, ordered, annealed after heating in a vacuum at 450 C

View Additional jPOWD Structure files for Cobaltite
[1] [2] [3]
 

Physical Properties of Cobaltite

Help on Cleavage: Cleavage: [100] Good, [010] Good, [001] Good
Help on Color: Color: Reddish silver white, Violet steel gray, Black.
Help on Density: Density: 6.33
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Magnetic after heating
Help on Streak: Streak: grayish black
 

Optical Properties of Cobaltite

Help on RL Pleochroism: RL Pleochroism: Very weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Cobaltite in Air
λ R  ∑ R(λ) 
 400 nm   48.20   
 420 nm   48.60 
 440 nm   49.00 
 460 nm   48.60 
 480 nm   48.30 
 500 nm   48.70 
 520 nm   49.40 
 540 nm   50.30 
 560 nm   51.20 
 580 nm   52.30 
 600 nm   53.20 
 620 nm   54.10 
 640 nm   54.80 
 660 nm   55.20 
 680 nm   55.40 
 700 nm   55.30 
Calculated Relative Intensity Colors of Cobaltite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%
R                      
 

Calculated Properties of Cobaltite

Help on Electron Density: Electron Density:

relectron=5.82 gm/cc
note: rCobaltite =6.35 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00144
Boson Index = 0.99856
Help on Photoelectric: Photoelectric:

PECobaltite = 45.56 barns/electron
U=PECobaltite x relectron= 265.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cobaltite is Not Radioactive
 

Cobaltite Classification
Help on Dana Class: Dana Class: 2.12.3.1 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.3)Cobaltite Group (Cubic or pseudocubic crystals)
 
2.12.3.1 Cobaltite CoAsS P ca21 mm2
 
2.12.3.2 Gersdorffite NiAsS P 213 2 3
 
2.12.3.3 Ullmannite NiSbS P 213 2 3
 
2.12.3.4 Willyamite (Co,Ni)SbS P 213 2 3
 
2.12.3.5 Tolovkite IrSbS P 213 2 3
 
2.12.3.6 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
2.12.3.7 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
2.12.3.8 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
2.12.3.9 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
2.12.3.10 Padmaite PdBiSe P 213 2 3
 
2.12.3.11 Michenerite (Pd,Pt)BiTe P 213 2 3
 
2.12.3.12 Maslovite PtBiTe P 213 2 3
 
2.12.3.13 Testibiopalladite PdTe(Sb,Te) P 213 2 3
 
2.12.3.14 Changchengite! IrBiS P 213 2 3
 
2.12.3.15 Milotaite! PdSbSe P 21/3 2 3
 
2.12.3.16 IMA2004-047! PdAsSe Pa3 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/D.18-10 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.18 - Cobaltite group, Cobaltite - Ullmannite - Tolovkite series
 
II/D.18-10 Cobaltite CoAsS P ca21 mm2
 
II/D.18-20 Gersdorffite NiAsS P 213 2 3
 
II/D.18-25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
II/D.18-30 Willyamite (Co,Ni)SbS P 213 2 3
 
II/D.18-40 Ullmannite NiSbS P 213 2 3
 
II/D.18-50 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
II/D.18-60 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
II/D.18-70 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
II/D.18-80 Tolovkite IrSbS P 213 2 3
 

Other Cobaltite 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 Cobaltite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Amethyst Galleries' Mineral Gallery 4 - Applied Mineralogy 5 -Athena 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 - Minerals of Wisconsin 16 - Philatelic Mineralogy 17 -QUT Mineral Atlas 18 - Scandinavian mineral gallery 19 - WWW-MINCRYST 20 -École des Mines de Paris

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Cobaltite

CoAsS
Dana No: 2.12.3.1 Strunz No: II/D.18-10
Locality:

 

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