Mineralogy Database

Nekrasovite Mineral Data

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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
 

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 - Hextetrahedral H-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
Relative
Intensity		    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

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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:

 
 
   
 

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