Izoklakeite Mineral Data (original) (raw)
General Izoklakeite Information
Chemical Formula:
Pb27(Cu,Fe)2(Sb,Bi)19S57
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 %
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
IMA1983-065
PDF 41-592
Izoklakeite Image
Images:
Izoklakeite Crystallography
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 - DipyramidalH-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),
Crystal Structure:
Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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| | Armbruster T , Hummel W , American Mineralogist , 72 (1987) p.821-831, (Sb,Bi,Pb) ordering in sulfosalts: Crystal-structure refinement of a Bi-rich, izoklakeite | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Izoklakeite
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
Optical Properties of Izoklakeite
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 | R 2 |  |
∑ 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
| RelativeIntensity | 0% | 30% | 60% | 90% | 100% | 120% | 150% | 180% | 210% | 220% |
|---|---|---|---|---|---|---|---|---|---|---|
| R1 | ||||||||||
| R2 |
Calculated Properties of Izoklakeite
Electron Density:
Bulk Density (Electron Density)=5.55 gm/cc
note: Specific Gravity of Izoklakeite =6.65 gm/cc.
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.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Izoklakeite is Not Radioactive
Izoklakeite Classification
Dana Class:
03.05.12.01 (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
03.05.12.01 Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m
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
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
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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Ask about Izoklakeite here :
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Print or Cut-and-Paste your Izoklakeite Specimen Label here :
Izoklakeite
Pb27(Cu,Fe)2(Sb,Bi)19S57
Dana No: 03.05.12.01 Strunz No: 02.HB.10b
Locality:
Notes: