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Tsumgallite Mineral Data

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General Tsumgallite Information

Help on Chemical  Formula: Chemical Formula: GaO(OH)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ga0.86Fe2+0.05Ge0.04Si0.02Zn0.01O(OH)1.01
Help on Environment: Environment: Associated in vugs in specimens of tennanite-germanite ore. Isostructural with goethite.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Tsumeb mine, Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Tsumeb mine and the composition (GALLium).
Help on Synonym: Synonym: IMA2002-011
 

Tsumgallite Image

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  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

Help on Axial Ratios: Axial Ratios: a:b:c =0.4617:1:0.3036
Help on Cell Dimensions: Cell Dimensions: a = 4.512, b = 9.772, c = 2.967, Z = 4; V = 130.82 Den(Calc)= 5.08
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: 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

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Pale greenish yellow, Biege.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Hardness: Hardness: 1.5-2.5 - Hardness very near Gypsum
Help on Luster: Luster: Pearly
 

Optical Properties of Tsumgallite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 1.94 - from Gladstone-Dale relationship (KC = 0.1854) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Tsumgallite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.76 gm/cc
note: Specific Gravity of Tsumgallite =5.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0035419123
Boson Index = 0.9964580877
Help on Photoelectric: Photoelectric: PETsumgallite = 36.38 barns/electron
U=PETsumgallite x rElectron Density= 173.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tsumgallite is Not Radioactive
 

Tsumgallite Classification

Help on  Dana Class: 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
Help on  Strunz Class: 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

Help on References: References: NAME( AmMin, v 89, p 896) PHYS. PROP.(AmMin, v 89, p 896) OPTIC PROP.(AmMin, v 89, p 896)
Help on See Also: 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

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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:

 

 
   
 


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