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Trattnerite

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Stradner Kogel Mt., Wilhelmsdorf, Bad Gleichenberg, Styria, Austria
© Knut Eldjarn

Show Trattnerite Photos (2)
Formula:
([],K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
System:HexagonalColour:Blue
Name:For mineral collector Walter Trattner, who found the specimen.


Osumilite Group.

Classification of Trattnerite

IMA status:Approved 2002
Strunz 8th edition ID:8/E.22-
Nickel-Strunz 10th (pending) edition ID:9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
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Type Occurrence of Trattnerite

Type Locality:Stradner Kogel Mt., Wilhelmsdorf, Bad Gleichenberg, Styria, Austria
Place of Conservation of Type Material:Landesmuseum Joanneum Graz and in the Natural History Museum Vienna, Austria
Geological Setting of type material:Xenolith in nepheline syenite
Associated Minerals at type locality:
TridymiteSanidineQuartzOrthopyroxene SubgroupOrthopyroxene Subgroup
Hematite

Physical Properties of Trattnerite

Lustre:Vitreous
Colour:Blue
Streak:White
Tenacity:Brittle
Cleavage:Distinct/Good
parallel to (001) is good, poor parallel to (100)
Density (calculated):2.68 g/cm3

Crystallography of Trattnerite

Crystal System:Hexagonal
Class (H-M):6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:P6/mcc {P6/m 2/c 2/c}
Cell Parameters:a = 10.050(1) Å, c = 14.338(2) Å
Ratio:a:c = 1 : 1.427
Unit Cell Volume:V 1,254.16 ų (Calculated from Unit Cell)
Z:2
Morphology:Hypidiomorphic, short prismatic to tabular crystals up to 1 mm.

Optical Data of Trattnerite

Type:Uniaxial (-)
RI values: nω = 1.589() nε = 1.586(1)
Maximum Birefringence:δ = 0.003

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Pleochroism:Visible
Comments:deep blue ({omega}) to yellowish-green ({epsilon})

Chemical Properties of Trattnerite

Formula:
([],K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
Essential elements:Fe, Mg, O, Si
All elements listed in formula:Fe, K, Mg, O, Si

Relationship of Trattnerite to other Species

Member of Group:
Osumilite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
9.CM.05Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
·2H
 
2
O
9.CM.05Brannockite
(K,Na)Li
 
3
Sn
 
2
Si
 
12
O
 
30
9.CM.05Chayesite
K(Mg,Fe)
 
4
FeSi
 
12
O
 
30
9.CM.05Darapiosite
KNa
 
2
Li(Mn,Zn)
 
2
ZrSi
 
12
O
 
30
9.CM.05Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
9.CM.05Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
9.CM.05Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
·H
 
2
O
9.CM.05Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
·H
 
2
O
9.CM.05Osumilite
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30
9.CM.05Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
9.CM.05Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
9.CM.05Sogdianite
(K,Na)
 
2
(Li,Fe)
 
3
(Zr,Ti,Fe)Si
 
12
O
 
30
9.CM.05Sugilite
KNa
 
2
(Fe,Mn,Al)
 
2
Li
 
3
Si
 
12
O
 
30
9.CM.05Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60
9.CM.05Berezanskite
KLi
 
3
Ti
 
2
Si
 
12
O
 
30
9.CM.05Dusmatovite
K(K,Na,[ ])(Mn
2+
 
,Y,Zr)
 
2
(Zn,Li)
 
3
Si
 
12
O
 
30
9.CM.05Shibkovite
K(Ca,Mn,Na)
 
2
(K
 
2-x
,□
 
x
)
 
2
Zn
 
3
Si
 
12
O
 
30
9.CM.05Almarudite
K([],Na)
 
2
(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
9.CM.05Oftedalite
(Sc,Ca,Mn
2+
 
)
 
2
K[(Be,Al)
 
3
Si
 
12
O
 
30
]
9.CM.10Faizievite
K
 
2
Na(Ca
 
6
Na)Ti
 
4
Li
 
6
[F
 
2
|Si
 
24
O
 
66
]

Other Names for Trattnerite

Synonyms:
IMA2002-002
Other Languages:
German:Trattnerit
Russian:Траттнерит

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 Trattnerite

Reference List:Postl, W., Walter, F., Ettinger, K., Hauzenberger, C., Bojar, H.-P. (2004): Trattnerite, (Fe,Mg)2(Mg,Fe)3[Si12O30], a new mineral of the milarite group: mineral data and crystal structure. European Journal of Mineralogy, 16(2), 375-380.

Internet Links for Trattnerite

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    Localities for Trattnerite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (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.
    Austria
     
    • Styria
      • Bad Gleichenberg
        • Wilhelmsdorf
    		W. Postl et al.: European Journal of Mineralogy 16(2):375-380 (2004)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 3rd Nov 2009 09:00:25