Sohngeite Mineral Data

General Sohngeite Information

Chemical Formula:

Ga(OH)3

Composition:

Molecular Weight = 120.75 gm

Gallium 57.74 % Ga 77.62 % Ga₂O₃

Hydrogen 2.50 % H 22.38 % H₂O

Oxygen 39.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ga(OH)₃

Environment:

Alteration product of gallite-bearing germanite in an oxidation zone of a dolostone-hosted hydrothermal polymetallic ore deposit.

IMA Status:

Approved IMA 1965

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for A.P.G. Sohnge, formerly Chief Geologist, Tsumeb Corporation, Tsumeb, Namibia.

Name Pronunciation:

Sohngeite + Pronunciation

Synonym:

Soehngeite

Sohngeite Image

Images:

Sohngeite

Comments: Minute, pale yellow sohngeite crystals to less than 0.2mm on matrix.
Location: Tsumeb mine, Tsumeb , Namibia. Scale: Picture size 3 mm.
© Tom Loomis / Dakota Matrix

Sohngeite Crystallography

Cell Dimensions:

a = 7.47, Z = 8; V = 416.83 Den(Calc)= 3.85

Crystal System:

Isometric - Diploidal H-M Symbol (2/m 3) Space Group: I m3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.74(1), 1.669(0.7), 2.63(0.6),

Physical Properties of Sohngeite

Color:

White, Pale yellow, Pale brown, Pale greenish yellow.

Density:

3.84

Diaphaneity:

Transparent to Translucent

Hardness:

4-4.5 - Between Fluorite and Apatite

Optical Properties of Sohngeite

Gladstone-Dale:

CI meas= 0.079 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1912,KPDmeas= 0.1917,KC= 0.208
Ncalc = 1.8

Optical Data:

Isotropic, n=1.736.

Calculated Properties of Sohngeite

Electron Density:

Bulk Density (Electron Density)=3.69 gm/cc
note: Specific Gravity of Sohngeite =3.84 gm/cc.

Fermion Index:

Fermion Index = 0.0001945646
Boson Index = 0.9998054354

Photoelectric:

PE_Sohngeite= 31.43 barns/electron
U=PE_Sohngeite x rElectron Density= 115.95 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sohngeite is Not Radioactive

Sohngeite Classification

Dana Class:

06.03.05.02 (06)Hydroxides and Oxides Containing Hydroxyl

(06.03)with (OH)3 or (OH)6 groups

(06.03.05)Dzhalindite Group

06.03.05.01 Dzhalindite In(OH)3 I m3 2/m 3

06.03.05.02 Sohngeite Ga(OH)3 I m3 2/m 3

06.03.05.03 Bernalite Fe(OH)3 Pmmn 2/m 2/m 2/m

Strunz Class:

04.FC.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FC -Hydroxides with OH, without H2O; corner-sharing octahedra

04.FC.05 Bernalite Fe(OH)3 Pmmn 2/m 2/m 2/m

04.FC.05 Dzhalindite In(OH)3 I m3 2/m 3

04.FC.05 Sohngeite Ga(OH)3 I m3 2/m 3

Other Sohngeite Information

References:

NAME( Athena) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Sohngeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Sohngeite Specimen Label here :

Sohngeite

Ga(OH)3
Dana No: 06.03.05.02 Strunz No: 04.FC.05
Locality:

Notes:

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