Wesselsite Mineral Data (original) (raw)

General Wesselsite Information

Help on Chemical Formula: Chemical Formula:

SrCu++Si4O10

Help on Composition: Composition:

Molecular Weight = 423.50 gm

Strontium 20.69 % Sr 24.47 % SrO

Copper 15.00 % Cu 18.78 % CuO

Silicon 26.53 % Si 56.75 % SiO2

Oxygen 37.78 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

SrCuSi4O10

Help on IMA Status: IMA Status:

Approved IMA 1994 (Dana # Added)

Help on Locality: Locality:

Wessels mine, Kalahari Manganese field, Kuruman Hill, Cape Province, South Africa. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after the locality.

Help on Name Pronunciation: Name Pronunciation:

Wesselsite + Pronunciation Say WESSELSITE

Help on Synonym: Synonym:

IMA1994-055

Wesselsite Image

Click Here for Larger Wesselsite Image in a New Browser Window Images:

Click Here for Larger Wesselsite Image Wesselsite Comments: Fragment of blue wesselsite. Location: Wessels mine, Kalahari Mn Fields, Northern Cape Province, South Africa.Scale: Sample Size 0.5 mm. © Tom Loomis / Dakota Matrix

Wesselsite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:2.1143

Help on Cell Dimensions: Cell Dimensions:

a = 7.366, c = 15.574, Z = 4; V = 845.01 Den(Calc)= 3.33

Help on Crystal System: Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/ncc

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.33(1), 3.12(0.55), 3.03(0.5),

Click Here for Large Wesselsite Structure Window Crystal Structure:

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Help on Above

| | Chakoumakos B C , Fernandez-Baca J A , Boatner L A , Journal of Solid State Chemistry , 103 (1993) p.105-113, Refinement of the structures of the layer silicates MCuSi4O10 (M=Ca,Sr,Ba), by Rietveld analysis of neutron powder diffraction data, Note: gillespite structure, Locality: synthetic | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Wesselsite

Help on Cleavage: Cleavage:

{001} Perfect

Help on Color: Color:

Blue.

Help on Density: Density:

3.2

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Hardness: Hardness:

4-5 - Fluorite-Apatite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

blue white

Optical Properties of Wesselsite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1832,KPDmeas= 0.1906,KC= 0.1854
Ncalc = 1.59 - 1.62

Help on Optical Data: Optical Data:

Uniaxial (-), e=1.59, w=1.63, bire=0.0400.

Calculated Properties of Wesselsite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.19 gm/cc
note: Specific Gravity of Wesselsite =3.33 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PEWesselsite = 30.44 barns/electron
U=PEWesselsite x rElectron Density= 97.18 barns/cc.

Help on Radioactivity: Radioactivity:

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

Wesselsite Classification

Help on Dana Class: Dana Class:

71.02.03.04 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.02)with 2:1 Layers

(71.02.03)Cuprorivaite group

71.02.03.01 Cuprorivaite CaCuSi4O10 P 4/nnc 4/m 2/m 2/m

71.02.03.02 Gillespite BaFeSi4O10 P 4/ncc 4/m 2/m 2/m

71.02.03.03 Effenbergerite BaCuSi4O10 P 4/nnc 4/m 2/m 2/m

71.02.03.04 Wesselsite! SrCuSi4O10 P 4/ncc 4/m 2/m 2/m

Help on Strunz Class: Strunz Class:

09.EA.05 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

09.EA.05 Cuprorivaite CaCuSi4O10 P 4/nnc 4/m 2/m 2/m

09.EA.05 Effenbergerite BaCuSi4O10 P 4/nnc 4/m 2/m 2/m

09.EA.05 Gillespite BaFeSi4O10 P 4/ncc 4/m 2/m 2/m

09.EA.05 Wesselsite! SrCuSi4O10 P 4/ncc 4/m 2/m 2/m

Other Wesselsite Information

Help on References: References:

PHYS. PROP.(Min.Mag.,Vol.60,p795,1996) OPTIC PROP.(Min.Mag.,Vol.60,p795,1996)

Help on See Also: See Also:

Links to other databases for Wesselsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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

Wesselsite

SrCu++Si4O10
Dana No: 71.02.03.04 Strunz No: 09.EA.05
Locality:

Notes: