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Effenbergerite

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Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa
© Brent Thorne

Show Effenbergerite Photos (4)
Formula:
BaCu[Si
 
4
O
 
10
]
System:TetragonalLustre:Vitreous
Hardness:4 - 5
Name:Named after Dr. Herta S. Effenberger, mineralogist and crystallograper of the University of Vienna
This page provides mineralogical data about Effenbergerite.

Classification of Effenbergerite

IMA status:Approved 1993
Strunz 8th edition ID:8/H.02-30
Nickel-Strunz 10th (pending) edition ID:9.EA.05

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
Dana 8th edition ID:71.2.3.3

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
2 : Sheets of 6-membered rings with 2:1 layers
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Type Occurrence of Effenbergerite

Type Locality:Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa
Year of Discovery:1994

Physical Properties of Effenbergerite

Lustre:Vitreous
Hardness (Mohs):4 - 5

Crystallography of Effenbergerite

Crystal System:Tetragonal
Cell Parameters:a = 7.44Å, c = 16.13Å
Ratio:a:c = 1 : 2.168
Unit Cell Volume:V 892.85 ų (Calculated from Unit Cell)

Optical Data of Effenbergerite

Type:Uniaxial (-)
RI values: nω = 1.633 nε = 1.593
Maximum Birefringence:δ = 0.040

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Effenbergerite

Formula:
BaCu[Si
 
4
O
 
10
]
Essential elements:Ba, Cu, O, Si
All elements listed in formula:Ba, Cu, O, Si

Relationship of Effenbergerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
[(F,OH)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
[(OH,F)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
[F|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
·3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
]·3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
·2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.60Penkvilksite
(Na,Ca)
 
4
(Ti,Zr)
 
2
Si
 
8
O
 
22
·5H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
)·2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
[(OH)
 
6
|AlSi
 
9
O
 
24
] · 3H
 
2
O
9.EA.75Zeravshanite
Cs
 
4
Na
 
2
Zr
 
3
[Si
 
18
O
 
45
](H
 
2
O)
 
2

Other Names for Effenbergerite

Synonyms:
IMA1993-036
Other Languages:
German:Effenbergerit
Russian:Эффенбергерит
Spanish:Effenbergerita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Effenbergerite

Reference List:New Minerals (1997), New Minerals 1990-1994.

Mineralogical Magazine: 58: 663-670.

Articles/Blogs about Effenbergerite

Internet Links for Effenbergerite

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    Localities for Effenbergerite

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    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		Min. Mag. 58. pp. 663-670
    Mineral and/or Locality
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