Tetrawickmanite Mineral Data

General Tetrawickmanite Information

Chemical Formula:

Mn++Sn++++(OH)6

Composition:

Molecular Weight = 275.69 gm

Manganese 19.93 % Mn 25.73 % MnO

Tin 43.06 % Sn 54.67 % SnO₂

Hydrogen 2.19 % H 19.60 % H₂O

Oxygen 34.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺Sn(OH)₆

IMA Status:

Approved IMA 1973

Locality:

Foote Quarry, Kings Mountain, Cleveland County, North Carolina, USA. Link to MinDat.org Location Data.

Name Origin:

Named as the tetragonal analog of wickmanite.

Name Pronunciation:

Tetrawickmanite + Pronunciation

Tetrawickmanite Image

Images:

Tetrawickmanite

Comments: Tan, pseudoctahedral crystal of tetrawickmanite on matrix.
Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tetrawickmanite Crystallography

Axial Ratios:

a:c = 1:1.00128

Cell Dimensions:

a = 7.787, c = 7.797, Z = 4; V = 472.79 Den(Calc)= 3.87

Crystal System:

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

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

By Intensity(I/I_o): 3.94(1), 2.77(0.9), 1.76(0.5),

Physical Properties of Tetrawickmanite

Cleavage:

None

Color:

Brown orange, Honey yellow.

Density:

3.65

Diaphaneity:

Transparent to Translucent

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Hardness:

3.5-4.5 - Between Copper Penny and Fluorite-Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Tetrawickmanite

Gladstone-Dale:

CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1866,KPDmeas= 0.1978,KC= 0.1955
Ncalc = 1.71 - 1.76

Optical Data:

Uniaxial (-), e=1.72, w=1.724, bire=0.0040.

Calculated Properties of Tetrawickmanite

Electron Density:

Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Tetrawickmanite =3.65 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_{Tetrawickmanite}= 132.04 barns/electron
U=PE_{Tetrawickmanite} x rElectron Density= 451.02 barns/cc.

Radioactivity:

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

Tetrawickmanite Classification

Dana Class:

06.03.07.02 (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 Tetrawickmanite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Tetrawickmanite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Tetrawickmanite

Mn++Sn++++(OH)6
Dana No: 06.03.07.02 Strunz No: 04.FC.15
Locality:

Notes:

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