Mineralogy Database

Effenbergerite Mineral Data

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General Effenbergerite Information

Help on Chemical  Formula: Chemical Formula: BaCuSi4O10
Help on Composition: Composition: Molecular Weight = 473.21 gm
   Barium   29.02 %  Ba   32.40 % BaO
   Copper   13.43 %  Cu   16.81 % CuO
   Silicon  23.74 %  Si   50.79 % SiO2
   Oxygen   33.81 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaCuSi4O10
Help on Environment: Environment: In a matrix consisting primarily of braunite, sugilite, and hausmannite, cut by pectolite veinlets. Ba-analog to cuprorivaite and Cu-analog to gillespite.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Central-eastern orebody of the Wessels mine, Kalahari Manganese Field, NW Cape Province, Republic of South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Dr. Herta S. Effenberger, mineralogist and crystallographer of the University of Vienna.
Help on Name Pronunciation: Name Pronunciation: Effenbergerite + Pronunciation Say EFFENBERGERITE
Help on Synonym: Synonym: ICSD 75970
  PDF 47-1779

Effenbergerite Image

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

Comments: Blue effenbergerite pods to across in massive purple sugilite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 4 mm.
© John Veevaert

Effenbergerite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.16783
Help on Cell Dimensions: Cell Dimensions: a = 7.442, c = 16.133, Z = 4; V = 893.50 Den(Calc)= 3.52
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/nnc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.0624(1), 3.1998(0.44), 2.3943(0.41),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 0) ( 1 1 0) ( 0 0 1) ( 1 0 2)

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Physical Properties of Effenbergerite

Help on Cleavage: Cleavage: {001} Perfect, {110} Poor
Help on Color: Color: Blue.
Help on Density: Density: 3.57 - 3.52, Average = 3.54
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: pale blue

Optical Properties of Effenbergerite

Help on Dichroism (e): Dichroism (e): pale blue.
Help on Dichroism (w): Dichroism (w): intense blue.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1741,KPDmeas= 0.1729,KC= 0.1757
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Uniaxial (-), e=1.593, w=1.633, bire=0.0400.

Calculated Properties of Effenbergerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.29 gm/cc
note: Specific Gravity of Effenbergerite =3.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEEffenbergerite = 131.55 barns/electron
U=PEEffenbergerite x rElectron Density= 432.53 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Effenbergerite is Not Radioactive

Effenbergerite Classification

Help on  Dana Class: Dana Class: (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.03)Cuprorivaite group Cuprorivaite CaCuSi4O10 P 4/nnc 4/m 2/m 2/m Gillespite BaFeSi4O10 P 4/ncc 4/m 2/m 2/m Effenbergerite BaCuSi4O10 P 4/nnc 4/m 2/m 2/m 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 Effenbergerite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Effenbergerite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 09.EA.05





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