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Koutekite Mineral Data
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General Koutekite Information
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 Chemical Formula: |
Cu5As2 |
| Composition: |
Molecular Weight = 467.57 gm |
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Copper 67.95 % Cu |
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Arsenic 32.05 % As |
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______ |
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100.00 % |
| Empirical Formula: |
Cu5As2 |
| Environment: |
Arsenical copper deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1958 |
| Locality: |
Cerny Dul, Czech Republic. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Jaromir Koutek (1902-1983), Czech mineralogist. |
| Name Pronunciation: |
Koutekite + Pronunciation  |
| Synonym: |
ICSD 26253 |
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PDF 46-1394 |
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Koutekite Image |
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Images:
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Koutekite Crystallography
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| Axial Ratios: |
a:c = 1:1.26324 |
| Cell Dimensions: |
a = 11.51, c = 14.54, Z = 18; V = 1,668.19 Den(Calc)= 8.38 |
| Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc |
| X Ray Diffraction: |
By Intensity(I/Io): 2.001(1), 2.044(0.9), 2.089(0.8), |
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Physical Properties of Koutekite
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| Color: |
Gray blue. |
| Density: |
8.48 |
| Diaphaneity: |
Opaque |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Koutekite
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| RL Anisotrophism: |
Strong. |
| RL Color: |
Bluish gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Koutekite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
52.60 |
50.80 |
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| 420 nm |
51.00 |
50.30 |
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| 440 nm |
49.40 |
49.80 |
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| 460 nm |
47.50 |
48.70 |
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| 480 nm |
45.30 |
47.50 |
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| 500 nm |
43.30 |
46.10 |
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| 520 nm |
41.40 |
44.50 |
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| 540 nm |
39.70 |
43.10 |
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| 560 nm |
38.30 |
41.80 |
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| 580 nm |
37.00 |
40.80 |
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| 600 nm |
36.00 |
40.40 |
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| 620 nm |
35.40 |
40.20 |
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| 640 nm |
34.80 |
40.20 |
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| 660 nm |
34.40 |
40.30 |
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| 680 nm |
34.10 |
40.40 |
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| 700 nm |
34.00 |
40.70 |
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Calculated Relative Intensity Colors of Koutekite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
| R1 |
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| R2 |
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Calculated Properties of Koutekite
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| Electron Density: |
Bulk Density (Electron Density)=7.56 gm/cc
note: Specific Gravity of Koutekite =8.38 gm/cc.
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| Fermion Index: |
Fermion Index = 0
Boson Index = 1 |
| Photoelectric: |
PEKoutekite = 54.50 barns/electron
U=PEKoutekite x rElectron Density= 412.19 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Koutekite is Not Radioactive |
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Koutekite Classification
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| Dana Class: |
02.03.01.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.03)where Am Bn Xp, with (m+n):p=5:2 |
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(02.03.01)Dana Group |
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02.03.01.01 Koutekite Cu5As2 P 63/mmc 6/m 2/m 2/m |
| Strunz Class: |
02.AA.10d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.A - Simple Sulfides, Selenides, etc |
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02.AA -Alloys of metalloids with Cu, Ag, Sn, Au |
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02.AA.10d Koutekite Cu5As2 P 63/mmc 6/m 2/m 2/m |
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Other Koutekite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Koutekite :
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 Koutekite Specimen Label here :
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Koutekite
Cu5As2
Dana No: 02.03.01.01 Strunz No: 02.AA.10d
Locality:
Notes:
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