Koutekite Mineral Data

Koutekite Mineral Data +

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General Koutekite Information

Chemical Formula:

Cu5As2

Composition:

Molecular Weight = 467.57 gm

Copper 67.95 % Cu

Arsenic 32.05 % As

______

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.

Synonym:

ICSD 26253

PDF 46-1394

Koutekite Image

Images:

Koutekite Algodonite

Comments: Silvery metallic koutekite with darker gray algodonite.
Location: Mohawk Mine, Keweenaw County, Michigan, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Koutekite Crystallography

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 DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.001(1), 2.044(0.9), 2.089(0.8),

Physical Properties of Koutekite

Color:

Gray blue.

Density:

8.48

Diaphaniety:

Opaque

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Streak:

black

Optical Properties of Koutekite

RL Anisotrophism:

Strong.

RL Color:

Bluish gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Koutekite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	52.60	50.80
420 nm	51.00	50.30
440 nm	49.40	49.80
460 nm	47.50	48.70
480 nm	45.30	47.50
500 nm	43.30	46.10
520 nm	41.40	44.50
540 nm	39.70	43.10
560 nm	38.30	41.80
580 nm	37.00	40.80
600 nm	36.00	40.40
620 nm	35.40	40.20
640 nm	34.80	40.20
660 nm	34.40	40.30
680 nm	34.10	40.40
700 nm	34.00	40.70

**Calculated Relative Intensity Colors of Koutekite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%
R₁
R₂

Calculated Properties of Koutekite

Electron Density:

r_electron=7.56 gm/cc
note: r_Koutekite=8.38 gm/cc.

Fermion Index

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_Koutekite= 54.50 barns/electron
U=PE_Koutekite x r_electron= 412.19 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Koutekite is Not Radioactive

Koutekite Classification

Dana Class:

2.3.1.1 (2)Sulfides - Including Selenides and Tellurides

(2.3)where Am Bn Xp, with (m+n):p=5:2

(2.3.1)Dana Group

2.3.1.1 Koutekite Cu5As2 P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

II/A.01-50 II - Sulfides and sulphosalts

II/A - Alloys and alloylike compounds, with Copper, Silver, Gold and Nickel

II/A.01 - Algodonite - Cuprostibite series

II/A.01-10 Algodonite Cu6As P 6₃/mmc 6/m 2/m 2/m

II/A.01-20 Domeykite Cu3As I 43d 4 3m

II/A.01-30 Horsfordite Cu5Sb Unk Cubic

II/A.01-40 Kutinaite Cu14Ag6As7 P m3m 4/m 3 2/m

II/A.01-50 Koutekite Cu5As2 P 6₃/mmc 6/m 2/m 2/m

II/A.01-60 Novakite (Cu,Ag)21As10 C 2/m ? 2/m

II/A.01-70 Cuprostibite Cu2(Sb,Tl) P 4/nmm 4/m 2/m 2/m

Other Koutekite Information

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Translate Koutekite Mineral Data :

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

Koutekite

Cu5As2
Dana No: 2.3.1.1 Strunz No: II/A.01-50
Locality:

Notes: