Mineralogy Database

Izoklakeite Mineral Data

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General Izoklakeite Information

Help on Chemical  Formula: Chemical Formula: Pb27(Cu,Fe)2(Sb,Bi)19S57
Help on Composition: Composition: Molecular Weight = 10557.27 gm
   Iron       0.21 %  Fe
   Copper     0.96 %  Cu
   Bismuth   15.84 %  Bi
   Antimony  12.69 %  Sb
   Lead      52.99 %  Pb
   Sulfur    17.31 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb27Cu1.6Fe2+0.4Sb11Bi8S57
Help on Environment: Environment: In a massive Zn-Cu-Pb sulfide deposit.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: From Izok Lake, Northwest Territories, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Izoklakeite + Pronunciation Say IZOKLAKEITE
Help on Synonym: Synonym: ICSD 202309
  PDF 41-592

Izoklakeite Image

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Comments: Prismatic metallic gray microcrystal of izoklakeite (mounted on paper).
Location: Vena Mine, Bergslagen, Orebro, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Izoklakeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.897:1:0.1072
Help on Cell Dimensions: Cell Dimensions: a = 34.07, b = 37.98, c = 4.072, Z = 2; V = 5,269.08 Den(Calc)= 6.65
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.427(1), 3.042(0.8), 3.312(0.8),

Physical Properties of Izoklakeite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Lead gray.
Help on Density: Density: 6.47
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: grayish black

Optical Properties of Izoklakeite

Help on RL Anisotrophism: RL Anisotrophism: Distinct, from greenish gray to dark gray to brownish gray.
Help on RL Pleochroism: RL Pleochroism: Pale greenish white to darker greenish white or gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Izoklakeite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   44.60   48.50 
 420 nm   44.10   48.40 
 440 nm   43.50   48.00 
 460 nm   42.50   47.40 
 480 nm   42.20   46.90 
 500 nm   41.60   46.20 
 520 nm   41.00   45.70 
 540 nm   40.60   45.20 
 560 nm   40.10   44.80 
 580 nm   39.80   44.40 
 600 nm   39.60   44.10 
 620 nm   39.30   43.80 
 640 nm   39.10   43.50 
 660 nm   38.80   43.20 
 680 nm   38.50   42.90 
 700 nm   38.20   42.50 
Calculated Relative Intensity Colors of Izoklakeite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 220%

Calculated Properties of Izoklakeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.55 gm/cc
note: Specific Gravity of Izoklakeite =6.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEIzoklakeite =1,325.67 barns/electron
U=PEIzoklakeite x rElectron Density=7,361.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Izoklakeite is Not Radioactive

Izoklakeite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.05.12)Dana Group Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 21/n 2/m
Help on  Strunz Class: Strunz Class: 02.HB.10b 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.10b Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 21/n 2/m
02.HB.10b Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m

Other Izoklakeite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Izoklakeite :
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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Dana No: Strunz No: 02.HB.10b





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