Effenbergerite Mineral Data (original) (raw)

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

IMA1993-036

PDF 47-1779

Effenbergerite Image

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

Click Here for Larger Effenbergerite Image 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 DipyramidalH-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:

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| | Forms:( 1 0 0) ( 1 1 0) ( 0 0 1) ( 1 0 2) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Effenbergerite 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 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:

71.02.03.03 (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 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
13 - WWW-MINCRYST

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

Effenbergerite

BaCuSi4O10
Dana No: 71.02.03.03 Strunz No: 09.EA.05
Locality:

Notes: