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Sveinbergeite

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Buer, Vesterøya, Sandefjord, Vestfold, Norway
© F.Andersen

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Formula:
Ca(Fe
2+
6
Fe
3+
 
)Ti
 
2
(Si
 
4
O
 
12
)
 
2
O
 
2
(OH)
 
5
(H
 
2
O)
 
4
System:TriclinicColour:Deep green
Hardness:3
Member of:Astrophyllite Group
Name:
Named in honour of Svein Arne Berge (b. 1949), a noted Norwegian
amateur mineralogist and collector who has made a significant contribution to the mineralogy of the alkaline pegmatites in the Larvik plutonic complex, Norway and who was the first to find the mineral in 1987.
This page provides mineralogical data about Sveinbergeite.

Classification of Sveinbergeite

IMA status:Approved 2010
Nickel-Strunz 10th (pending) edition ID:9.DC.05

9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12
Dana 8th edition ID:69.1.1.6

69 : INOSILICATES Chains with Side Branches or Loops
1 : Chains with Side Branches or Loops with (P=2, and N=4, 2 branches)
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Type Occurrence of Sveinbergeite

Type Locality:Buer, Vesterøya, Sandefjord, Vestfold, Norway
General Appearance of Type Material:As 0.01-0.05 mm thick lamellar (0.2-0.5 X 5-10mm crystals forming rosette-like divergent groups and spherical aggregates. Often covered by brown coatings of iron (and possibly manganese) oxides.
Place of Conservation of Type Material:Fersman Mineralogical Museum, Moscow,
Russia, catalogue number 3966
Year of Discovery:1987
Geological Setting of type material:A syenite pegmatite embedded in larvikite in the Larvik plutonic complex in the southern part of the Oslo Region, Norway.

Physical Properties of Sveinbergeite

Lustre:Vitreous, Pearly
Colour:Deep green
Streak:pale green
Hardness (Mohs):3
Hardness Data:Measured
Cleavage:Perfect
on {001}
Density (calculated):3.152 g/cm3

Crystallography of Sveinbergeite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 5.33(1) Å, b = 11.82(2) Å, c = 11.85(2) Å
α = 101.2(1)°, β = 98.2(1)°, γ = 102.5(2)°
Ratio:a:b:c = 0.451 : 1 : 1.003
Unit Cell Volume:V 701.56 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
11.148 (20)
5.683 (5)
3.799 (43)
2.853 (100)
2.633 (7)
2.489 (5)
2.267 (5)
1.643 (5)

Optical Data of Sveinbergeite

Type:Biaxial (+)
RI values: nα = 1.745 nβ = 1.746 nγ = 1.753
2V:Measured: 20(3)°
Maximum Birefringence:δ = 0.008

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Pleochroism:Visible
Comments:Z > X ~ Y : Z is deep green, X and Y are brownish green.

Chemical Properties of Sveinbergeite

Formula:
Ca(Fe
2+
6
Fe
3+
 
)Ti
 
2
(Si
 
4
O
 
12
)
 
2
O
 
2
(OH)
 
5
(H
 
2
O)
 
4
Essential elements:Ca, Fe, H, O, Si, Ti
All elements listed in formula:Ca, Fe, H, O, Si, Ti

Relationship of Sveinbergeite to other Species

Member of:Astrophyllite Group
Other Members of Group:

- +
Astrophyllite
(K,Na)
 
3
(Fe,Mn)
 
7
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
7
Hydroastrophyllite
(H
 
3
O,K,Ca)
 
3
(Fe,Mn)
 
5-65
Ti
 
2
Si
 
8
(O,OH)
 
31
Kupletskite
(K,Na)
 
3
(Mn,Fe)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
Kupletskite-(Cs)
(Cs,K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Ti,Nb)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
Magnesioastrophyllite
(Na,K)
 
4
Mg
 
2
(Fe,Fe,Mn)
 
5
Ti
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
Nalivkinite
Li
 
2
Na(Fe
2+
 
,Mn
2+
 
)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
Niobokupletskite
K
 
2
Na(Mn,Zn,Fe)
 
7
(Nb,Zr,Ti)
 
2
Si
 
8
O
 
26
(OH)
 
4
(O,F)
Niobophyllite
(K,Na)
 
3
(Fe,Mn)
 
6
(Nb,Ti)
 
2
Si
 
8
(O,OH,F)
 
31
Tarbagataite
(K□)Ca(Fe
2+
 
,Mn)
 
7
Ti
 
2
(Si
 
4
O
 
12
)
 
2
O
 
2
(OH)
 
5
Zircophyllite
(K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Zr,Ti)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
Common Associates:
MolybdeniteMicroclineKatophoriteGalenaFluorapatite
AlbiteAegirine
Related Minerals - Nickel-Strunz Grouping):

- +
9.DC.05Astrophyllite
(K,Na)
 
3
(Fe,Mn)
 
7
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
7
9.DC.05Hydroastrophyllite
(H
 
3
O,K,Ca)
 
3
(Fe,Mn)
 
5-65
Ti
 
2
Si
 
8
(O,OH)
 
31
9.DC.05Kupletskite
(K,Na)
 
3
(Mn,Fe)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
9.DC.05Magnesioastrophyllite
(Na,K)
 
4
Mg
 
2
(Fe,Fe,Mn)
 
5
Ti
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
9.DC.05Niobophyllite
(K,Na)
 
3
(Fe,Mn)
 
6
(Nb,Ti)
 
2
Si
 
8
(O,OH,F)
 
31
9.DC.05Zircophyllite
(K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Zr,Ti)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
9.DC.05Kupletskite-(Cs)
(Cs,K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Ti,Nb)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
9.DC.05Niobokupletskite
K
 
2
Na(Mn,Zn,Fe)
 
7
(Nb,Zr,Ti)
 
2
Si
 
8
O
 
26
(OH)
 
4
(O,F)
9.DC.05Nalivkinite
Li
 
2
Na(Fe
2+
 
,Mn
2+
 
)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F

Other Names for Sveinbergeite

Synonyms:
IMA2010-027
Other Languages:

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 Sveinbergeite

Reference List:

- +
Khomyakov, A.P., Cámara, F., Sokolova, E. and Hawthorne, F.C. (2010): Sveinbergeite, IMA 2010-027. CNMNC Newsletter, October 2010, p. 899.

Mineralogical Magazine 74, 899-902.

Berge, S.A., Larsen, K.E. & Andersen, F. (2011): Buer, Vesterøya, Sandefjord- en typelokalitet for et nytt mineral. Norsk Bergverksmuseum Skrift. 46: 49-56

Khomyakov, A.P., Cámara, F., Sokolova, E.,Abdu, Y. & Hawthorne, F.C. (2011): Sveinbergeite, Ca(Fe6 2+6 Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4, a new astrophyllite-group mineral from the Larvik Plutonic Complex, Oslo Region, Norway: description and crystal structure. Mineralogical Magazine. 75(5): 2687–2702

Internet Links for Sveinbergeite

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    • Localities for Sveinbergeite

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Norway
     
    • Vestfold
      • Sandefjord
        • Vesterøya
    		CNMNC Newsletter, October 2010; Khomyakov, A.P., Cámara, F., Sokolova, E.,Abdu, Y. & Hawthorne, F.C. (2011): Sveinbergeite, Ca(Fe6 2+6 Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4, a new astrophyllite-group mineral from the Larvik Plutonic Complex, Oslo Region, Norway: description and crystal structure. Mineralogical Magazine. 75(5): 2687–2702
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    Locality Updated: GreeceFrom Uwe Kolitsch, 21st May 2013 12:13:40