| |
 |
Tsumgallite Mineral Data
|
|
|
General Tsumgallite Information
|
 Chemical Formula: |
GaO(OH) |
| Composition: |
Molecular Weight = 100.05 gm |
| |
Zinc 0.65 % Zn 0.81 % ZnO |
| |
Gallium 59.93 % Ga 80.56 % Ga2O3 |
| |
Iron 2.79 % Fe 3.59 % FeO |
| |
Silicon 0.56 % Si 1.20 % SiO2 |
| |
Germanium 2.90 % Ge 4.18 % GeO2 |
| |
Hydrogen 1.02 % H 9.09 % H2O |
| |
Oxygen 32.14 % O |
| |
______ ______ |
| |
100.00 % 99.44 % = TOTAL OXIDE |
| Empirical Formula: |
Ga0.86Fe2+0.05Ge0.04Si0.02Zn0.01O(OH)1.01 |
| Environment: |
Associated in vugs in specimens of tennanite-germanite ore. Isostructural with goethite. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Tsumeb mine, Tsumeb, Namibia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the Tsumeb mine and the composition (GALLium). |
| Synonym: |
IMA2002-011 |
| |
Tsumgallite Image |
|
Images:
|
|
Tsumgallite
Comments: BSE image of an irregular patch of dark tsumgallite in complex ore.
Location: Tsumeb mine, Tsumeb, Namibia..
Scale: See Image.
© Diederik Visser |
|
Tsumgallite Crystallography
|
| Axial Ratios: |
a:b:c =0.4617:1:0.3036 |
| Cell Dimensions: |
a = 4.512, b = 9.772, c = 2.967, Z = 4; V = 130.82 Den(Calc)= 5.08 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.404(1)(111), 4.089(1)(110), 2.632(0.33)(130),1.69(0.26)(221), 2.53(0.22)(021), 1.538(0.21)(151,160), |
| |
Physical Properties of Tsumgallite
|
| Cleavage: |
{010} Perfect |
| Color: |
Pale greenish yellow, Biege. |
| Diaphaneity: |
Translucent |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks. |
| Habit: |
Micaceous - Platy texture with "flexible" plates. |
| Hardness: |
1.5-2.5 - Hardness very near Gypsum |
| Luster: |
Pearly |
| |
Optical Properties of Tsumgallite
|
| Optical Data: |
Biaxial (?) |
| |
NCalc= 1.94 - from Gladstone-Dale relationship (KC = 0.1854) where Ncalc=Dcalc*KC+1
|
| |
Calculated Properties of Tsumgallite
|
| Electron Density: |
Bulk Density (Electron Density)=4.76 gm/cc
note: Specific Gravity of Tsumgallite =5.08 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.0035419123
Boson Index = 0.9964580877 |
| Photoelectric: |
PETsumgallite = 36.38 barns/electron
U=PETsumgallite x rElectron Density= 173.28 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tsumgallite is Not Radioactive |
| |
Tsumgallite Classification
|
| Dana Class: |
06.01.01.06 (06)Hydroxides and Oxides Containing Hydroxyl |
| |
(06.01)where X+++O OH |
| |
(06.01.01)Diaspore group (Orthorhombic, Pnma or Pnmd) |
| |
06.01.01.01 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m |
| |
06.01.01.02 Goethite FeO(OH) Pbnm 2/m 2/m 2/m |
| |
06.01.01.03 Groutite MnO(OH) Pbnm 2/m 2/m 2/m |
| |
06.01.01.04 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m |
| |
06.01.01.05 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m |
| |
06.01.01.06 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m |
| Strunz Class: |
04.FD.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
| |
04.F - Hydroxides (without V or U) |
| |
04.FD -Hydroxides with OH, without H2O; chains of edge-sharing octahedra |
| |
04.FD.10 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m |
| |
04.FD.10 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m |
| |
04.FD.10 Guyanaite CrO(OH) Pnnm 2/m 2/m 2/m |
| |
04.FD.10 Groutite MnO(OH) Pbnm 2/m 2/m 2/m |
| |
04.FD.10 Goethite FeO(OH) Pbnm 2/m 2/m 2/m |
| |
04.FD.10 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m |
| |
04.FD.10 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m |
| |
Other Tsumgallite Information
|
| References: |
NAME( AmMin, v 89, p 896) PHYS. PROP.(AmMin, v 89, p 896) OPTIC PROP.(AmMin, v 89, p 896) |
| See Also: |
Links to other databases for Tsumgallite :
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
Search for Tsumgallite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Tsumgallite :
Ask about Tsumgallite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
Print or Cut-and-Paste your Tsumgallite Specimen Label here :
|
Tsumgallite
GaO(OH)
Dana No: 06.01.01.06 Strunz No: 04.FD.10
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.