Wesselsite Mineral Data

Wesselsite Mineral Data
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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

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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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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 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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Wesselsite

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

 

Notes: