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Tsumgallite

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About TsumgalliteHide

Formula:
GaO(OH)
Colour:
Pale greenish yellow to beige
Lustre:
Pearly
Hardness:
1 - 2
Specific Gravity:
5.08
Crystal System:
Orthorhombic
Member of:
Name:
Named for the type locality, the TSUMcor Mine, Tsumeb, Namibia, and the chemical composition, which contains GALLium.
Diaspore Group.

Tsumgallite is a gallium oxide hydroxide.


Classification of TsumgalliteHide

Approved
Approval Year:
2002
4.FD.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
D : Hydroxides with OH, without H2O; chains of edge-sharing octahedra

Physical Properties of TsumgalliteHide

Pearly
Transparency:
Translucent
Colour:
Pale greenish yellow to beige
Streak:
white
Hardness:
1 - 2 on Mohs scale
Cleavage:
Perfect
on {010}
Density:
5.08 g/cm3 (Measured)    

Chemical Properties of TsumgalliteHide

Formula:
GaO(OH)
Common Impurities:
Zn,Ge,Fe,Si

Crystallography of TsumgalliteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 4.512 Å, b = 9.773 Å, c = 2.967 Å
Ratio:
a:b:c = 0.462 : 1 : 0.304
Unit Cell V:
130.8 ų
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.089 (100)
2.404 (100)
2.632 (33)
1.690 (26)
2.530 (22)

Type Occurrence of TsumgalliteHide

General Appearance of Type Material:
Scaly mica-like aggregates less than 1 mm across. Individual thin, platy crystals not exceeding 40μm in size.
Geological Setting of Type Material:
in vugs of a tennantite-germanite ore
Associated Minerals at Type Locality:

Synonyms of TsumgalliteHide

Other Language Names for TsumgalliteHide

German:Tsumgallit
Simplified Chinese:羟氧镓石
Spanish:Tsumgallita
Traditional Chinese:羥氧鎵石

Relationship of Tsumgallite to other SpeciesHide

Member of:
Other Members of this group:
BracewelliteCrO(OH)Orth. mmm (2/m 2/m 2/m)
DiasporeAlO(OH)Orth. mmm (2/m 2/m 2/m)
Goethiteα-Fe3+O(OH)Orth. mmm (2/m 2/m 2/m)
GroutiteMn3+O(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
Montroseite(V3+,Fe3+)O(OH)Orth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Germanite4 photos of Tsumgallite associated with Germanite on mindat.org.
Gallite3 photos of Tsumgallite associated with Gallite on mindat.org.
Siderite1 photo of Tsumgallite associated with Siderite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.FD.05SpertiniiteCu(OH)2Orth.
4.FD.10BracewelliteCrO(OH)Orth. mmm (2/m 2/m 2/m)
4.FD.10DiasporeAlO(OH)Orth. mmm (2/m 2/m 2/m)
4.FD.10GroutiteMn3+O(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.FD.10GuyanaiteCrO(OH)Orth.
4.FD.10Montroseite(V3+,Fe3+)O(OH)Orth.
4.FD.15ManganiteMn3+O(OH)Mon. 2/m : P21/b
4.FD.20Yttrotungstite-(Y)YW2O6(OH)3
4.FD.20Yttrotungstite-(Ce)(Ce,Nd,Y)W2O6(OH)3Mon. 2 : P21
4.FD.20Unnamed (Nd-analogue of Yttrotungstite-(Ce))(Nd,Ce,La)W2O6(OH)3
4.FD.25FrankhawthorneiteCu2Te6+O4(OH)2Mon.
4.FD.30KhinitePb2+Cu2+3[Te6+O6](OH)2Orth. mm2 : Fdd2
4.FD.30Khinite-3TPb2+Cu2+3Te6+O6(OH)2Trig. 3 : P32

Fluorescence of TsumgalliteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for TsumgalliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Neues Jahrbuch für Mineralogie, Monatshefte (2003): 521-527.

Internet Links for TsumgalliteHide

Localities for TsumgalliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Namibia (TL)
 
  • Oshikoto Region (Otjikoto Region)
    • Tsumeb
Neues Jahrbuch für Mineralogie - Monatshefte Vol:2003 No.11 p521-527
Mineral and/or Locality  
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