Stottite Mineral Data

Stottite Mineral Data +

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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

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 202596

PDF 11-161

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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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Stottite

Electron Density:

r_electron=3.45 gm/cc
note: r_Stottite=3.55 gm/cc.

Fermion Index

Fermion Index = 0.02991
Boson Index = 0.97009

Photoelectric:

PE_Stottite= 26.12 barns/electron
U=PE_Stottite x r_electron= 90.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stottite is Not Radioactive

Stottite Classification

Dana Class:

6.3.7.1 (6)Hydroxides and Oxides Containing Hydroxyl

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

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

6.3.7.1 Stottite FeGe(OH)6 P 4₁/n 4/m

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

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

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

Strunz Class:

IV/F.17-40 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.17 - Stottite group, Mopungite - Stottite series

IV/F.17-10 Mopungite NaSb(OH)6 P 4₁/n 4/m

IV/F.17-20 Tetrawickmanite MnSn(OH)6 P 4₁/n 4/m

IV/F.17-30 Jeanbandyite (Fe,Mn)Sn(OH)6 P 4₁/n 4/m

IV/F.17-40 Stottite FeGe(OH)6 P 4₁/n 4/m

IV/F.17-50 Eyselite! FeGe3O7(OH) P*** Ortho

Other Stottite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Stottite

Fe++Ge(OH)6
Dana No: 6.3.7.1 Strunz No: IV/F.17-40
Locality:

Notes: