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Izoklakeite Mineral Data
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General Izoklakeite Information
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 Chemical Formula: |
Pb27(Cu,Fe)2(Sb,Bi)19S57 |
| Composition: |
Molecular Weight = 10557.27 gm |
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Iron 0.21 % Fe |
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Copper 0.96 % Cu |
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Bismuth 15.84 % Bi |
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Antimony 12.69 % Sb |
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Lead 52.99 % Pb |
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Sulfur 17.31 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb27Cu1.6Fe2+0.4Sb11Bi8S57 |
| Environment: |
In a massive Zn-Cu-Pb sulfide deposit. |
| IMA Status: |
Approved IMA 1986 |
| Locality: |
From Izok Lake, Northwest Territories, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Izoklakeite + Pronunciation  |
| Synonym: |
ICSD 202309 |
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IMA1983-065 |
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PDF 41-592 |
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Izoklakeite Image |
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Images:
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Izoklakeite Crystallography
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| Axial Ratios: |
a:b:c =0.897:1:0.1072 |
| Cell Dimensions: |
a = 34.07, b = 37.98, c = 4.072, Z = 2; V = 5,269.08 Den(Calc)= 6.65 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| X Ray Diffraction: |
By Intensity(I/Io): 3.427(1), 3.042(0.8), 3.312(0.8), |
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Physical Properties of Izoklakeite
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| Cleavage: |
{001} Good |
| Color: |
Lead gray. |
| Density: |
6.47 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Hardness: |
3.5-4 - Copper Penny-Fluorite |
| Luster: |
Metallic |
| Streak: |
grayish black |
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Optical Properties of Izoklakeite
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| RL Anisotrophism: |
Distinct, from greenish gray to dark gray to brownish gray. |
| RL Pleochroism: |
Pale greenish white to darker greenish white or gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Izoklakeite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
44.60 |
48.50 |
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| 420 nm |
44.10 |
48.40 |
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| 440 nm |
43.50 |
48.00 |
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| 460 nm |
42.50 |
47.40 |
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| 480 nm |
42.20 |
46.90 |
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| 500 nm |
41.60 |
46.20 |
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| 520 nm |
41.00 |
45.70 |
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| 540 nm |
40.60 |
45.20 |
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| 560 nm |
40.10 |
44.80 |
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| 580 nm |
39.80 |
44.40 |
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| 600 nm |
39.60 |
44.10 |
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| 620 nm |
39.30 |
43.80 |
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| 640 nm |
39.10 |
43.50 |
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| 660 nm |
38.80 |
43.20 |
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| 680 nm |
38.50 |
42.90 |
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| 700 nm |
38.20 |
42.50 |
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Calculated Relative Intensity Colors of Izoklakeite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
220% |
| R1 |
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| R2 |
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Calculated Properties of Izoklakeite
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| Electron Density: |
Bulk Density (Electron Density)=5.55 gm/cc
note: Specific Gravity of Izoklakeite =6.65 gm/cc.
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| Fermion Index: |
Fermion Index = 0.11
Boson Index = 0.89 |
| Photoelectric: |
PEIzoklakeite =1,325.67 barns/electron
U=PEIzoklakeite x rElectron Density=7,361.37 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Izoklakeite is Not Radioactive |
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Izoklakeite Classification
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| Dana Class: |
03.05.12.01 (03)Sulfides - Sulfosalts |
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(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.05.12)Dana Group |
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03.05.12.01 Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m |
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03.05.12.02 Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 21/n 2/m |
| Strunz Class: |
02.HB.10b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HB -With Cu, Ag, Hg, Fe, Sn and Pb |
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02.HB.10b Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 21/n 2/m |
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02.HB.10b Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m |
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Other Izoklakeite Information
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Izoklakeite Specimen Label here :
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Izoklakeite
Pb27(Cu,Fe)2(Sb,Bi)19S57
Dana No: 03.05.12.01 Strunz No: 02.HB.10b
Locality:
Notes:
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