Wiserite Mineral Data

General Wiserite Information

Chemical Formula:

Mn4B2O5(OH,Cl)4

Composition:

Molecular Weight = 398.62 gm

Manganese 55.13 % Mn 71.18 % MnO

Boron 5.42 % B 17.46 % B₂O₃

Hydrogen 0.88 % H 7.91 % H₂O

Chlorine 4.45 % Cl 4.45 % Cl

- % Cl -1.00 % -O=Cl₂

Oxygen 34.12 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₄B₂O₅(OH)_3.5Cl_0.5

Environment:

Accessory mineral in stratiform manganese deposits.

IMA Status:

Valid Species (Pre-IMA) 1845

Locality:

Gonzen mine, near Sargans, St. Gallen, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named for David Friedrich Wiser (1802-1878), Swiss mineralogist who first analyzed the mineral.

Name Pronunciation:

Wiserite

Synonym:

ICSD 203150

PDF 45-1470

Wiserite Image

Images:

Wiserite

Comments: Pale pink granular wiserite.
Location: Kombat Mine, Kombat, Otjozondjupa, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wiserite Crystallography

Axial Ratios:

a:c = 1:0.16249

Cell Dimensions:

a = 20.192, c = 3.281, Z = 7; V = 1,337.72 Den(Calc)= 3.46

Crystal System:

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

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

By Intensity(I/I_o): 14.4(1), 2.66(0.8), 6.42(0.8),

Physical Properties of Wiserite

Cleavage:

None

Color:

White, Brownish, Reddish, Pinkish brown.

Density:

3.42 - 3.54, Average = 3.48

Diaphaneity:

Transparent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Wiserite

Gladstone-Dale:

CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2116,KPDmeas= 0.2103,KC= 0.2187
Ncalc = 1.75 - 1.77

Optical Data:

Uniaxial (-), e=1.7-1.717, w=1.751-1.76, bire=0.0430-0.0510.

Calculated Properties of Wiserite

Electron Density:

Bulk Density (Electron Density)=3.30 gm/cc
note: Specific Gravity of Wiserite =3.46 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Wiserite= 14.65 barns/electron
U=PE_Wiserite x rElectron Density= 48.31 barns/cc.

Radioactivity:

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

Wiserite Classification

Dana Class:

27.01.10.01 (27)Compound Borates

(27.01)Dana Type

(27.01.10)Dana Group

27.01.10.01 Wiserite Mn4B2O5(OH,Cl)4 P 4/n 4/m

Strunz Class:

06.BA.20 06 - BORATES

06.B - Diborates

06.BA -Neso-diborates with double triangles B2(O,OH)5; 2(2D); 2(2D) + OH, etc.

06.BA.20 Wiserite Mn4B2O5(OH,Cl)4 P 4/n 4/m

Other Wiserite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Wiserite :
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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Print or Cut-and-Paste your Wiserite Specimen Label here :

Wiserite

Mn4B2O5(OH,Cl)4
Dana No: 27.01.10.01 Strunz No: 06.BA.20
Locality:

Notes:

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