Stottite Mineral Data

General Stottite Information

Chemical Formula:

Fe++Ge(OH)6

Composition:

Molecular Weight = 230.50 gm

Iron 24.23 % Fe 31.17 % FeO

Germanium 31.50 % Ge 45.38 % GeO₂

Hydrogen 2.62 % H 23.45 % H₂O

Oxygen 41.65 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺Ge(OH)₆

Environment:

Secondary mineral formed in an oxidized zone of a germanium-rich dolostone-hosted hydrothermal polymetallic ore deposit.

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

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

Name Origin:

Named for Charles E. Stott (1896-1978), geologist and formerly General Director of the Tsumeb mine, Tsumeb, Namibia.

Name Pronunciation:

Stottite

Synonym:

ICSD 202596

PDF 11-161

Stottite Image

Images:

Stottite Brunogeierite

Comments: Brownish gray, cubic (tetartoidal) brunogeierite crystals with earthy gray stottite and zincian siderite matrix.
Location: Tsumeb, Namibia. Scale: Cabinent Size.
© William Pinch

Stottite Crystallography

Axial Ratios:

a:c = 1:0.98604

Cell Dimensions:

a = 7.594, c = 7.488, Z = 4; V = 431.82 Den(Calc)= 3.55

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: P 4₁/n

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

By Intensity(I/I_o): 3.767(1), 2.655(0.8), 1.687(0.7),

Crystal Structure:

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Ross C R , Bernstein L R , Waychunas G A , American Mineralogist , 73 (1988) p.657-661, Crystal-structure refinement of stottite, FeGe(OH)6

Physical Properties of Stottite

Cleavage:

{100} Good, {010} Good, {001} Distinct

Color:

Brown, Colorless, Green.

Density:

3.596 - 3.61, Average = 3.6

Diaphaneity:

Transparent to Translucent

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Greasy (Oily)

Streak:

gray white

Optical Properties of Stottite

Gladstone-Dale:

CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2065,KPDmeas= 0.2034,KC= 0.2141
Ncalc = 1.76 - 1.77

Optical Data:

Uniaxial (-), e=1.728, w=1.738, bire=0.0100.

Calculated Properties of Stottite

Electron Density:

Bulk Density (Electron Density)=3.45 gm/cc
note: Specific Gravity of Stottite =3.55 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Stottite= 26.12 barns/electron
U=PE_Stottite x rElectron Density= 90.11 barns/cc.

Radioactivity:

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

Stottite Classification

Dana Class:

06.03.07.01 (06)Hydroxides and Oxides Containing Hydroxyl

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

(06.03.07)Wickmanite group (Tetragonal: P42/n)

06.03.07.01 Stottite FeGe(OH)6 P 4₁/n 4/m

06.03.07.02 Tetrawickmanite MnSn(OH)6 P 4₁/n 4/m

06.03.07.03 Jeanbandyite (Fe,Mn)Sn(OH)6 P 4₁/n 4/m

06.03.07.04 Mopungite NaSb(OH)6 P 4₁/n 4/m

Strunz Class:

04.FC.15 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.15 Jeanbandyite (Fe,Mn)Sn(OH)6 P 4₁/n 4/m

04.FC.15 Mopungite NaSb(OH)6 P 4₁/n 4/m

04.FC.15 Stottite FeGe(OH)6 P 4₁/n 4/m

04.FC.15 Tetrawickmanite MnSn(OH)6 P 4₁/n 4/m

Other Stottite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stottite :
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
15 - WWW-MINCRYST

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Ask about Stottite here :
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Print or Cut-and-Paste your Stottite Specimen Label here :

Stottite

Fe++Ge(OH)6
Dana No: 06.03.07.01 Strunz No: 04.FC.15
Locality:

Notes: