Mineralogy Database

Ovamboite Mineral Data

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General Ovamboite Information

Help on Chemical  Formula: Chemical Formula: Cu20(Fe,Cu,Zn)6W2Ge6S32
Help on Composition: Composition: Molecular Weight = 3,470.24 gm
   Vanadium     0.09 %  V
   Zinc         3.28 %  Zn
   Gallium      0.46 %  Ga
   Iron         4.67 %  Fe
   Copper      39.21 %  Cu
   Tin          0.03 %  Sn
   Germanium    9.86 %  Ge
   Molybdenum   1.00 %  Mo
   Arsenic      2.55 %  As
   Tungsten     9.70 %  W
   Sulfur      29.17 %  S
              100.00 % 
Help on Empirical Formula: Empirical Formula: Cu21.41Fe2+2.9Zn1.74W1.83Mo0.36V2+0.06Sn0.01Ge4.71As1.18Ga0.23S31.57
Help on Environment: Environment: In a germanium-bearing massive-sulfide base-metal deposit.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Tsumeb deposit, Ovamboland, Namibia, and (2) the Maikain deposit, Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA1992-039

Ovamboite Image

Click Here for Larger   Image in a New Browser Window Images:
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Comments: BSE image of ovamboite (ov), germanite (germ) and chalcocite (cc).
Location: Tsumeb deposit, Namibia. Scale: See Image.
© Diederik Visser

Ovamboite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.68, Z = 1; V = 1,218.19 Den(Calc)= 4.73
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): 3.08(1)(222), 1.887(0.7)(440), 1.612(0.5)(622),2.67(0.2)(400), 1.225(0.15)(662), 1.333(0.1)(800), 1.543(0.1)(444),

Physical Properties of Ovamboite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Cubic Crystals - Occurs as cubic shaped crystals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic

Optical Properties of Ovamboite

Help on RL Anisotrophism: RL Anisotrophism: None.
Help on RL Bireflectance: RL Bireflectance: None.
Help on RL Color: RL Color: Pale yellowish pink with no internal reflections.
Help on RL Pleochroism: RL Pleochroism: None.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ovamboite in Air
λ R  ∑ R(λ) 
 470 nm   24.00   
 546 nm   24.30 
 589 nm   24.40 
 650 nm   24.00 
Calculated Relative Intensity Colors of Ovamboite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 370%

Calculated Properties of Ovamboite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.37 gm/cc
note: Specific Gravity of Ovamboite =4.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEOvamboite = 145.87 barns/electron
U=PEOvamboite x rElectron Density= 637.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ovamboite is Not Radioactive

Ovamboite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.04)Germanite Group Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 42c- 4 2m Germanite Cu26Fe4Ge4S32 P 43n 4 3m Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 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 Ovamboite Information

Help on References: References: NAME( CanMin, 42:1250) PHYS. PROP.(CanMin, 42:1250) OPTIC PROP.(CanMin, 42:1250)
Help on See Also: See Also: Links to other databases for Ovamboite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 02.CB.30





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