Krutaite Mineral Data

General Krutaite Information

Chemical Formula:

CuSe2

Composition:

Molecular Weight = 221.47 gm

Copper 28.69 % Cu

Selenium 71.31 % Se

______

100.00 %

Empirical Formula:

CuSe₂

Environment:

Of hydrothermal origin included in clausthalite.

IMA Status:

Approved IMA 1972

Locality:

Petrovice, Jihomoravský Kraj, Moravia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for Tomas Kruta, Director of the Mineralogy Laboratory, Moravian Museum, Bron, Czechoslovakia.

Name Pronunciation:

Krutaite

Synonym:

ICSD 243

PDF 26-1115

Krutaite Image

Images:

Krutaite

Comments: Dark gray, metallic, octahedral crystals of krutaite on matrix.
Location: El DragÃ³n mine, Quijarro province, PotosÃ, Bolivia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Krutaite Kerstenite Clinochalcomenite

Comments: Tan opaque fibrous kerstenite with possible blue clinochalcomenite on dark krutaite.
Location: Mina El Dragon, Potosi, Bolivia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Krutaite Crystallography

Cell Dimensions:

a = 6.056, Z = 4; V = 222.10 Den(Calc)= 6.62

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

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

By Intensity(I/I_o): 2.712(1), 3.023(0.9), 2.477(0.8),

Crystal Structure:

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Milman V , Acta Crystallographica, Section B , 58 (2002) p.437-447, Klockmannite, CuSe: structure, properties and phase stability from ab initio, modeling, Locality: hypothetical structure calculated using DFT

Physical Properties of Krutaite

Cleavage:

{???} Good

Color:

Gray.

Diaphaneity:

Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Hardness:

4 - Fluorite

Luster:

Metallic

Streak:

dark gray

Optical Properties of Krutaite

RL Anisotrophism:

Zones rich in Co and Ni are anisotropic in yellow-brown tints.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Krutaite in Air**
λ	R	∑ R(λ)
400 nm	36.00
420 nm	36.20
440 nm	36.40
460 nm	36.30
480 nm	36.10
500 nm	35.80
520 nm	35.40
540 nm	34.90
560 nm	34.30
580 nm	33.60
600 nm	33.00
620 nm	32.40
640 nm	32.00
660 nm	31.70
680 nm	31.50
700 nm	31.40

**Calculated Relative Intensity Colors of Krutaite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%
R

Calculated Properties of Krutaite

Electron Density:

Bulk Density (Electron Density)=5.80 gm/cc
note: Specific Gravity of Krutaite =6.62 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Krutaite= 70.89 barns/electron
U=PE_Krutaite x rElectron Density= 411.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Krutaite is Not Radioactive

Krutaite Classification

Dana Class:

02.12.01.08 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.01)Pyrite Group (Isometric: Pa3)

02.12.01.01 Pyrite FeS2 P a3 2/m 3

02.12.01.02 Vaesite NiS2 P a3 2/m 3

02.12.01.03 Cattierite CoS2 P a3 2/m 3

02.12.01.04 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

02.12.01.05 Trogtalite CoSe2 P a3 2/m 3

02.12.01.06 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

02.12.01.07 Fukuchilite Cu3FeS8 P a3 2/m 3

02.12.01.08 Krutaite CuSe2 P a3 2/m 3

02.12.01.09 Hauerite MnS2 P a3 2/m 3

02.12.01.10 Laurite RuS2 P a3 2/m 3

02.12.01.11 Aurostibite AuSb2 P a3 2/m 3

02.12.01.12 Krutovite NiAs2 P a3 2/m 3

02.12.01.13 Sperrylite PtAs2 P a3 2/m 3

02.12.01.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3

02.12.01.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

02.12.01.16 Erlichmanite OsS2 P a3 2/m 3

02.12.01.17 Dzharkenite FeSe2 P a3 2/m 3

02.12.01.18 Gaotaiite Ir3Te8 P a3 2/m 3

02.12.01.19 Mayingite IrBiTe P a3 2/m 3

Strunz Class:

02.EB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.E - Metal Sulfides, M:S £ 1:2

02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.

02.EB.05a Aurostibite AuSb2 P a3 2/m 3

02.EB.05a Cattierite CoS2 P a3 2/m 3

02.EB.05a Hauerite MnS2 P a3 2/m 3

02.EB.05a Fukuchilite Cu3FeS8 P a3 2/m 3

02.EB.05a Dzharkenite FeSe2 P a3 2/m 3

02.EB.05a Erlichmanite OsS2 P a3 2/m 3

02.EB.05a Geversite Pt(Sb,Bi)2 P a3 2/m 3

02.EB.05a Gaotaiite Ir3Te8 P a3 2/m 3

02.EB.05a Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

02.EB.05a Laurite RuS2 P a3 2/m 3

02.EB.05a Krutaite CuSe2 P a3 2/m 3

02.EB.05a Pyrite FeS2 P a3 2/m 3

02.EB.05a Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

02.EB.05a Sperrylite PtAs2 P a3 2/m 3

02.EB.05a Vaesite NiS2 P a3 2/m 3

02.EB.05a Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

02.EB.05a Trogtalite CoSe2 P a3 2/m 3

Other Krutaite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Krutaite :
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 Krutaite Specimen Label here :

Krutaite

CuSe2
Dana No: 02.12.01.08 Strunz No: 02.EB.05a
Locality:

Notes: