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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Search for Ovamboite Images |
Images:
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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 - HextetrahedralH-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. |
Diaphaniety: |
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: |
relectron=4.37 gm/cc note: rOvamboite =4.73 gm/cc. |
Fermion Index |
Fermion Index = 0.02864 Boson Index = 0.97136 |
Photoelectric: |
PEOvamboite = 145.87 barns/electron U=PEOvamboite x relectron= 637.34 barns/cc. |
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: |
2.9.4.4 (2)Sulfides - Including Selenides and Tellurides |
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(2.9)where Am Bn Xp, with (m+n):p=1:1 |
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(2.9.4)Germanite Group |
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2.9.4.1 Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 42c- 4 2m |
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2.9.4.2 Germanite Cu26Fe4Ge4S32 P 43n 4 3m |
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2.9.4.3 Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m |
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2.9.4.4 Ovamboite ! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m |
Strunz Class: |
II/C.10-55 II - Sulfides and sulphosalts |
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II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1 |
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II/C.10 - Stannite group, Germanite series |
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II/C.10-10 Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 42c- 4 2m |
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II/C.10-15 Vinciennite Cu10Fe4Sn(As,Sb)S16 P 4122 4 2 2 |
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II/C.10-20 Germanite Cu26Fe4Ge4S32 P 43n 4 3m |
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II/C.10-30 Nekrasovite Cu26V2(Sn,As,Sb)6S32 P 43n 4 3m |
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II/C.10-40 Colusite Cu12-13V(As,Sb,Sn,Ge)3S16 P 43n 4 3m |
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II/C.10-45 Stibiocolusite Cu13V(Sb,As,Sn)3S16 P 43n 4 3m |
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II/C.10-47 Germanocolusite Cu13V(Ge,As)3S16 P 43n 4 3m |
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II/C.10-50 Arsenosulvanite Cu3(As,V)S4 P 43m 4 3m |
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II/C.10-50* Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m |
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II/C.10-55 Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m |
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II/C.10-60 Sulvanite Cu3VS4 P 43m 4 3m |
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II/C.10-70 Polkovicite (Fe,Pb)3(Ge,Fe)1-xS4 F d3m 4/m 3 2/m |
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II/C.10-80 Morozeviczite (Pb,Fe)3Ge1-xS4 F d3m 4/m 3 2/m |
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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 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 -QUT Mineral Atlas
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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: 2.9.4.4 Strunz No: II/C.10-55
Locality:
Notes:
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