Krutaite Mineral Data

Krutaite Mineral Data +

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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.

Synonym:

ICSD 243

PDF 26-1115

Krutaite Image

Images:

Krutaite

Comments: Dark gray, metallic, octahedral crystals of krutaite on matrix.
Location: El Drag?n mine, Quijarro province, Potos?, 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),

Physical Properties of Krutaite

Cleavage:

[???] Good

Color:

Gray.

Diaphaniety:

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:

r_electron=5.80 gm/cc
note: r_Krutaite=6.62 gm/cc.

Fermion Index

Fermion Index = 0.05419
Boson Index = 0.94581

Photoelectric:

PE_Krutaite= 70.89 barns/electron
U=PE_Krutaite x r_electron= 411.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Krutaite is Not Radioactive

Krutaite Classification

Dana Class:

2.12.1.8 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.1)Pyrite Group (Isometric: Pa3)

2.12.1.1 Pyrite FeS2 P a3 2/m 3

2.12.1.2 Vaesite NiS2 P a3 2/m 3

2.12.1.3 Cattierite CoS2 P a3 2/m 3

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

2.12.1.5 Trogtalite CoSe2 P a3 2/m 3

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

2.12.1.7 Fukuchilite Cu3FeS8 P a3 2/m 3

2.12.1.8 Krutaite CuSe2 P a3 2/m 3

2.12.1.9 Hauerite MnS2 P a3 2/m 3

2.12.1.10 Laurite RuS2 P a3 2/m 3

2.12.1.11 Aurostibite AuSb2 P a3 2/m 3

2.12.1.12 Krutovite NiAs2 P a3 2/m 3

2.12.1.13 Sperrylite PtAs2 P a3 2/m 3

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

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

2.12.1.16 Erlichmanite OsS2 P a3 2/m 3

2.12.1.17 Dzharkenite FeSe2 P a3 2/m 3

2.12.1.18 Gaotaiite Ir3Te8 P a3 2/m 3

2.12.1.19 Mayingite IrBiTe P a3 2/m 3

Strunz Class:

II/D.17-70 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.17 - Pyrite group and related compounds, Fukuchilite - Micherenite

II/D.17-10 Fukuchilite Cu3FeS8 P a3 2/m 3

II/D.17-20 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

II/D.17-30 Pyrite FeS2 P a3 2/m 3

II/D.17-40 Cattierite CoS2 P a3 2/m 3

II/D.17-50 Vaesite NiS2 P a3 2/m 3

II/D.17-60 Hauerite MnS2 P a3 2/m 3

II/D.17-65 Dzharkenite FeSe2 P a3 2/m 3

II/D.17-70 Krutaite CuSe2 P a3 2/m 3

II/D.17-80 Trogtalite CoSe2 P a3 2/m 3

II/D.17-90 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

II/D.17-100 Laurite RuS2 P a3 2/m 3

II/D.17-110 Erlichmanite OsS2 P a3 2/m 3

II/D.17-120 Sperrylite PtAs2 P a3 2/m 3

II/D.17-130 Aurostibite AuSb2 P a3 2/m 3

II/D.17-140 Geversite Pt(Sb,Bi)2 P a3 2/m 3

II/D.17-150 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

II/D.17-153 Changchengite! IrBiS P 2₁3 2 3

II/D.17-155 Mayingite IrBiTe P a3 2/m 3

II/D.17-160 Maslovite PtBiTe P 2₁3 2 3

II/D.17-170 Testibiopalladite PdTe(Sb,Te) P 2₁3 2 3

II/D.17-175 Padmaite PdBiSe P 2₁3 2 3

II/D.17-180 Michenerite (Pd,Pt)BiTe P 2₁3 2 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 -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 - WWW-MINCRYST 13 -École des Mines de Paris

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Krutaite

CuSe2
Dana No: 2.12.1.8 Strunz No: II/D.17-70
Locality:

Notes: