Mineralogy Database

Kobellite Mineral Data

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General Kobellite Information

Help on Chemical  Formula: Chemical Formula: Pb22Cu4(Bi,Sb)30S69
Help on Composition: Composition: Molecular Weight = 12858.40 gm
   Copper     1.98 %  Cu
   Bismuth   40.63 %  Bi
   Antimony   4.73 %  Sb
   Lead      35.45 %  Pb
   Sulfur    17.21 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb22Cu4Bi25Sb5S69
Help on Environment: Environment: High temperature hydrothermal mineral.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1839
Help on Locality: Locality: Hvena, Sweden; Ouray, Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wolfgang Franz von Kobell (1803-1882), German mineralogist.
Help on Name Pronunciation: Name Pronunciation: Kobellite + Pronunciation Say KOBELLITE
Help on Synonym: Synonym: ICSD 23595
  PDF 8-122
 

Kobellite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Kobellite

Comments: Dark gray metallic crystalline kobellite with quartz.
Location: Crabtree Quarry, Raleigh, Wake County, North Carolina, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kobellite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6637:1:0.1179
Help on Cell Dimensions: Cell Dimensions: a = 22.62, b = 34.08, c = 4.02, Z = 1; V = 3,098.98 Den(Calc)= 6.89
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.54(1), 3.41(0.9), 2.72(0.5),
 

Physical Properties of Kobellite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: Lead gray, Steel gray.
Help on Density: Density: 6.3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Kobellite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Color: RL Color: White.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Kobellite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   43.40   50.60 
   
 420 nm   44.30   50.30 
 440 nm   45.20   50.00 
 460 nm   45.10   49.50 
 480 nm   44.40   48.80 
 500 nm   43.60   48.00 
 520 nm   42.70   47.20 
 540 nm   41.90   46.40 
 560 nm   41.20   45.70 
 580 nm   40.60   45.00 
 600 nm   40.00   44.40 
 620 nm   39.60   44.00 
 640 nm   39.40   43.50 
 660 nm   39.20   43.10 
 680 nm   39.00   43.00 
 700 nm   39.00   42.80 
Calculated Relative Intensity Colors of Kobellite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 220%
R1                    
R2                    
 

Calculated Properties of Kobellite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.74 gm/cc
note: Specific Gravity of Kobellite =6.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEKobellite =1,457.46 barns/electron
U=PEKobellite x rElectron Density=8,362.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kobellite is Not Radioactive
 

Kobellite Classification

Help on  Dana Class: Dana Class: 03.06.19.01 (03)Sulfides - Sulfosalts
  (03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.06.19)Dana Group
 
03.06.19.01 Kobellite Pb22Cu4(Bi,Sb)30S69 Pnmm 2/m 2/m 2/m
 
03.06.19.02 Tintinaite Pb22Cu4(Sb,Bi)30S69 Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.HB.10a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HB -With Cu, Ag, Hg, Fe, Sn and Pb
 
02.HB.10a Kobellite Pb22Cu4(Bi,Sb)30S69 Pnmm 2/m 2/m 2/m
 
02.HB.10a Tintinaite Pb22Cu4(Sb,Bi)30S69 Pnnm 2/m 2/m 2/m
 

Other Kobellite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Kobellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Kobellite

Pb22Cu4(Bi,Sb)30S69
Dana No: 03.06.19.01 Strunz No: 02.HB.10a
Locality:

 

Notes:

 

 
   
 


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