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Ovamboite Mineral Data
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General Ovamboite Information
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 Chemical Formula: |
Cu20(Fe,Cu,Zn)6W2Ge6S32 |
| Composition: |
Molecular Weight = 3,470.24 gm |
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Vanadium 0.09 % V |
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Zinc 3.28 % Zn |
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Gallium 0.46 % Ga |
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Iron 4.67 % Fe |
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Copper 39.21 % Cu |
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Tin 0.03 % Sn |
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Germanium 9.86 % Ge |
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Molybdenum 1.00 % Mo |
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Arsenic 2.55 % As |
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Tungsten 9.70 % W |
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Sulfur 29.17 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu21.41Fe2+2.9Zn1.74W1.83Mo0.36V2+0.06Sn0.01Ge4.71As1.18Ga0.23S31.57 |
| Environment: |
In a germanium-bearing massive-sulfide base-metal deposit. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Tsumeb deposit, Ovamboland, Namibia, and (2) the Maikain deposit, Kazakhstan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA1992-039 |
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Ovamboite Image |
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Images:
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Ovamboite
Comments: BSE image of ovamboite (ov), germanite (germ) and chalcocite (cc).
Location: Tsumeb deposit, Namibia.
Scale: See Image.
© Diederik Visser |
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Ovamboite Crystallography
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| Cell Dimensions: |
a = 10.68, Z = 1; V = 1,218.19 Den(Calc)= 4.73 |
| Crystal System: |
Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 43n |
| 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), |
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Physical Properties of Ovamboite
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| Cleavage: |
None |
| Color: |
Gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Cubic Crystals - Occurs as cubic shaped crystals. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
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Optical Properties of Ovamboite
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| RL Anisotrophism: |
None. |
| RL Bireflectance: |
None. |
| RL Color: |
Pale yellowish pink with no internal reflections. |
| RL Pleochroism: |
None. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Ovamboite in Air
| λ |
R |
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∑ R(λ) |
| 470 nm |
24.00 |
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| 546 nm |
24.30 |
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| 589 nm |
24.40 |
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| 650 nm |
24.00 |
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Calculated Relative Intensity Colors of Ovamboite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
360% |
370% |
| R |
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Calculated Properties of Ovamboite
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| Electron Density: |
Bulk Density (Electron Density)=4.37 gm/cc
note: Specific Gravity of Ovamboite =4.73 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEOvamboite = 145.87 barns/electron
U=PEOvamboite x rElectron Density= 637.34 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ovamboite is Not Radioactive |
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Ovamboite Classification
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| Dana Class: |
02.09.04.04 (02)Sulfides - Including Selenides and Tellurides |
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(02.09)where Am Bn Xp, with (m+n):p=1:1 |
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(02.09.04)Germanite Group |
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02.09.04.01 Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 42c- 4 2m |
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02.09.04.02 Germanite Cu26Fe4Ge4S32 P 43n 4 3m |
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02.09.04.03 Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m |
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02.09.04.04 Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m |
| Strunz Class: |
02.CB.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CB -With Zn, Fe, Cu, Ag, Au, etc |
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02.CB.30 Colusite Cu12-13V(As,Sb,Sn,Ge)3S16 P 43n 4 3m |
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02.CB.30 Germanite Cu26Fe4Ge4S32 P 43n 4 3m |
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02.CB.30 Germanocolusite Cu13V(Ge,As)3S16 P 43n 4 3m |
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02.CB.30 Nekrasovite Cu26V2(Sn,As,Sb)6S32 P 43n 4 3m |
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02.CB.30 Stibiocolusite Cu13V(Sb,As,Sn)3S16 P 43n 4 3m |
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02.CB.30 Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m |
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02.CB.30 Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m |
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Other Ovamboite Information
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| References: |
NAME( CanMin, 42:1250) PHYS. PROP.(CanMin, 42:1250) OPTIC PROP.(CanMin, 42:1250) |
| 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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Print or Cut-and-Paste your Ovamboite Specimen Label here :
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Ovamboite
Cu20(Fe,Cu,Zn)6W2Ge6S32
Dana No: 02.09.04.04 Strunz No: 02.CB.30
Locality:
Notes:
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