Nekrasovite Mineral Data (original) (raw)

General Nekrasovite Information

Help on Chemical Formula: Chemical Formula:

Cu+26V2(Sn,As,Sb)6S32

Help on Composition: Composition:

Molecular Weight = 3,426.88 gm

Vanadium 1.64 % V

Zinc 0.19 % Zn

Iron 4.73 % Fe

Copper 44.50 % Cu

Tin 10.39 % Sn

Antimony 5.33 % Sb

Arsenic 3.28 % As

Sulfur 29.94 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Cu18Cu6Fe2+2Zn0.1V3+1.1Fe3+0.9Sn3As1.5Sb1.5S32

Help on Environment: Environment:

In ore aggregates within propylitic andesites and dacites.

Help on IMA Status: IMA Status:

Approved IMA 1984

Help on Locality: Locality:

Khayragatsch deposit, Kuramin Mountains, eastern Uzbekistan. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for I. Y. Nekrasov, Russian mineralogist.

Help on Name Pronunciation: Name Pronunciation:

Nekrasovite + Pronunciation Say NEKRASOVITE

Search for Nekrasovite Images

Click Here To Search Images:

Nekrasovite Crystallography

Help on Cell Dimensions: Cell Dimensions:

a = 10.73, Z = 1; V = 1,235.38 Den(Calc)= 4.61

Help on Crystal System: Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: P 43n

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.09(1), 1.894(0.8), 1.617(0.6),1.23(0.5), 1.033(0.3), 1.096(0.3), 2.68(0.2),

Physical Properties of Nekrasovite

Help on Color: Color:

Reddish brown.

Help on Density: Density:

4.62

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Help on Hardness: Hardness:

4.5-5 - Near Apatite

Help on Luster: Luster:

Metallic

Optical Properties of Nekrasovite

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Nekrasovite in Air

λ R ∑ R(λ)
440 nm 22.60
460 nm 23.80
480 nm 25.00
500 nm 25.60
520 nm 26.00
540 nm 26.40
560 nm 26.90
580 nm 27.40
600 nm 28.00
620 nm 28.60
640 nm 29.30
660 nm 29.60
680 nm 29.90
700 nm 30.00

Calculated Relative Intensity Colors of Nekrasovite in Air

RelativeIntensity 0% 40% 80% 100% 120% 160% 200% 240% 280% 320% 360% 370%
R

Calculated Properties of Nekrasovite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=4.27 gm/cc
note: Specific Gravity of Nekrasovite =4.61 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PENekrasovite = 73.85 barns/electron
U=PENekrasovite x rElectron Density= 315.47 barns/cc.

Help on Radioactivity: Radioactivity:

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

Nekrasovite Classification

Help on Dana Class: Dana Class:

03.01.01.03 (03)Sulfides - Sulfosalts

(03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.01.01)Colusite Group (Isometric: P-43n) with Cu and V

03.01.01.01 Colusite Cu12-13V(As,Sb,Sn,Ge)3S16 P 43n 4 3m

03.01.01.02 Germanocolusite Cu13V(Ge,As)3S16 P 43n 4 3m

03.01.01.03 Nekrasovite Cu26V2(Sn,As,Sb)6S32 P 43n 4 3m

03.01.01.04 Stibiocolusite Cu13V(Sb,As,Sn)3S16 P 43n 4 3m

Help on Strunz Class: Strunz Class:

02.CB.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CB -With Zn, Fe, Cu, Ag, Au, etc

02.CB.30 Colusite Cu12-13V(As,Sb,Sn,Ge)3S16 P 43n 4 3m

02.CB.30 Germanite Cu26Fe4Ge4S32 P 43n 4 3m

02.CB.30 Germanocolusite Cu13V(Ge,As)3S16 P 43n 4 3m

02.CB.30 Nekrasovite Cu26V2(Sn,As,Sb)6S32 P 43n 4 3m

02.CB.30 Stibiocolusite Cu13V(Sb,As,Sn)3S16 P 43n 4 3m

02.CB.30 Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m

02.CB.30 Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m

Other Nekrasovite Information

Help on References: References:

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

Help on See Also: See Also:

Links to other databases for Nekrasovite :
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

Search for Nekrasovite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Nekrasovite :

A Bijoux Google Search for Nekrasovite
Adam's Minerals Google Search for Nekrasovite
Cape Minerals Google Search for Nekrasovite
Dakota Matrix Minerals Google Search for Nekrasovite
Excalibur Mineral Corp. Google Search for Nekrasovite
Exceptional Minerals Google Search for Nekrasovite
John Betts Fine Minerals Search for Nekrasovite
McDougall Minerals Google Search for Nekrasovite
Mineral News Website Link
Rock and Mineral Shows Google Search for Nekrasovite
Weinrich Minerals, Inc. Google Search for Nekrasovite

Ask about Nekrasovite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Nekrasovite

Cu+26V2(Sn,As,Sb)6S32
Dana No: 03.01.01.03 Strunz No: 02.CB.30
Locality:

Notes: