Otjisumeite Mineral Data + 
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- 7.10.3.1 Otjisumeite PbGe4O9 P1,P 1 Tri
- IV/C.08-10 Yimengite K(Cr,Ti,Fe,Mg)12O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-20 Hawthorneite Ba[Ti3Cr4Fe4Mg]O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-22 Haggertyite! Ba[Fe6Ti5Mg]O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-25 Batiferrite! Ba(Ti2Fe8Fe2)O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-30 Hibonite (Ca,Ce)(Al,Ti,Mg)12O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-35 Nezilovite! PbZn2(Mn,Ti)2Fe8O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-40 Magnetoplumbite Pb(Fe,Mn)12O19 P 63/mmc 6/m 2/m 2/m
- IV/C.08-45 Zenzenite Pb3(Fe,Mn)4Mn3O15 P 63/mcm 6/m 2/m 2/m
- IV/C.08-47 Lindqvistite Pb2(Mn,Mg)Fe16027 P 63/mmc 6/m 2/m 2/m
- IV/C.08-50 Plumboferrite Pb2Fe(11-x)MnxO19-2x(x=1/3) P 63/mmc 6/m 2/m 2/m
- IV/C.08-60 Bartelkeite PbFeGe3O8 P 21,P 21/m Mono
- IV/C.08-70 Otjisumeite PbGe4O9 P1,P 1 Tri
General Otjisumeite Information |
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 Chemical Formula: |
PbGe4O9 | ||
| Composition: |
Molecular Weight = 641.63 gm | ||
| Germanium 45.27 % Ge 65.21 % GeO2 | |||
| Lead 32.29 % Pb 34.79 % PbO | |||
| Oxygen 22.44 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
PbGe4O9 | ||
| Environment: |
With other Ge-bearing minerals. | ||
| IMA Status: |
Approved IMA 1981 | ||
| Locality: |
Tsumeb mine, Namibia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the Herrero tribe name of the locality, Tsumeb. | ||
| Synonym: |
ICSD 64910 | ||
| PDF 35-473 | |||
Search for Otjisumeite Images | |||
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Images:
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Otjisumeite Crystallography |
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| Axial Ratios: |
a:b:c =1.0554:1:1.4101 | ||
| Cell Dimensions: |
a = 6.945, b = 6.58, c = 9.279, Z = 2; alpha = 102.94°, beta = 103.05°, gamma = 114.77° V = 365.55 Den(Calc)= 5.83 | ||
| Crystal System: |
TriclinicSpace Group: P1,P 1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.95(1), 3.41(0.5), 4.2(0.4), | ||
Physical Properties of Otjisumeite |
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| Cleavage: |
[???] Indistinct | ||
| Color: |
Colorless, White. | ||
| Diaphaniety: |
Translucent | ||
| Habit: |
Pseudo Hexagonal - Crystals show a hexagonal outline. | ||
| Hardness: |
3 - Calcite | ||
| Luster: |
Subadamantine | ||
| Streak: |
white | ||
Optical Properties of Otjisumeite |
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| Gladstone-Dale: |
CI calc= -0.026 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1592,KC= 0.1552 |
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| Optical Data: |
Biaxial (+), a=1.92, b=1.922, g=1.943, bire=0.0230, 2V(Calc)=36, 2V(Meas)=20. | ||
Calculated Properties of Otjisumeite |
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| Electron Density: |
relectron=5.12 gm/cc |
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| Fermion Index |
Fermion Index = 0.10678 Boson Index = 0.89322 |
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| Photoelectric: |
PEOtjisumeite = 593.80 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Otjisumeite is Not Radioactive |
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Otjisumeite Classification |
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| Dana Class: |
7.10.3.1 (7)Multiple Oxides | ||
| (7.10)Dana Type | |||
| (7.10.3)Dana Group | |||
| Strunz Class: |
IV/C.08-70 IV - Oxides | ||
| IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) | |||
| IV/C.08 - Yimngite - Otjisumeite series | |||
Other Otjisumeite Information |
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| References: |
PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Otjisumeite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Otjisumeite using: Visit our Advertisers for Otjisumeite : Translate Otjisumeite Mineral Data : Ask about Otjisumeite here : Print or Cut-and-Paste your Otjisumeite Specimen Label here :
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